Tesla Model Y RWD vs Model Y Long Range Winter highway and city efficiency test
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- Опубліковано 28 січ 2024
- Thanks for watching our video, i hope this helped in case you were on the fence about which model to get.
If you're planning on buying a Tesla please use our referral link as you will get a discount or awards ( depending on location )
Use my referral link to buy a Tesla and get awards like 3 months of Enhanced Autopilot. ts.la/mihai868924 If you've ever wondered what the energy efficiency difference between a Y rwd vs a Y long range ( Dual Motor), we set out to find out exactly that.
They are both 2023 Model Ys, the rwd is a June build and the dual motor is a December build.
- both on Michelin winter tires
- drivers weigh the same weight
- driving behind each other
- temperature varied from 0c - 3c
In the next video we will run them both from 100% to 5% to see what the real world range difference is. - Авто та транспорт
I like this video, straightforward, informative, no ads, no BS, real world examples. According to this, I cant justify the 8-9k € more for Long Range. Range is not that much longer lol
Thanks 😁, happy to help
We'll do more of these little videos soon to compare them more in depth
I'm currently in the process or ordering new Model 3 RWD, I'm from Europe. This is just confirmation that RWD is most efficient Tesla@@Twin.motors
Yep me neither. I was leaning towards the LR but for 50 more km. And maybe a better sound system. I don’t feel it’s worth 10kCAD even in Canadian winter condition.
@@Bigbarry889 does the Canadian variant get the lesser Sound system ?
Here in Europe they both have the "premium " speakers.
Depending on where you live, the all wheel drive may be a consideration.
Great comparison - no fluff - just the information. Thanks! Looking at the differences and that the LFP battery should be charged to 100% weekly, it seems LFP is the way to go.
Should be charged...to calibrate the BMS. It degrades the same way than NMC at the same voltage (so with the same autonomy). Obviously, NMC does allow higher voltage and therefore higher autonomy when needed.
Excellent video I was looking for such a long time. A great complement would be to compare charging times and charging curves. Thank you so much !
Just ordered MY RWD.
Why RWD?
1. Long range costs 10k more which I can use in case I have to replace battery in future.
2. I think the power is sufficient on RWD
3. Can use winter tyres if required and it should be good on snow. We don't get that much snow here in BC.
4. Tyres wear out less on RWD as it is lighter
Just the other day I measured my tires vs the LR and mine wore down evenly all around, barely lost 1mm in 5000km vs the LR that dropped 3mm on the rear tires.
I would like to mention that it is very much down to your style of driving. My brother drives his LR like he stole it and it seems to eat tires like crazy
thanks for testing and sharing
My wife and I picked up a gently used (7K on odometer) Model Y - Rear Wheel Drive - Standard Range -LFP battery - its actually impressively efficient ! Cheers from Canada 🇨🇦 PS - we also own a 2022 Model 3 Dual Motor -Long Range - its amazing - however the Y standard range offers greater space /versatility in our opinion (based on our use case scenario) is the better overall value for function + Efficiency with not that huge difference in range overall .
I picked the RWD LFP battery because of the: 1) Safety 2) 2500 charge cycles vs 100 charge cycles 3) Lower degradation 4) cost. I hope I did the right choice. Will be delivered next week. Can’t wait
You 100% will not be disappointed. Despite the LR trying to intice me with it's 500hp, I still prefer the RWD. I feel it's a more balanced vehicle overall.
2500 vs 100 ? You mean 1000 ? You do realize 1000 cycles is over 10 yrs right ?
I think that Long Range makes sense only if you are driving long distances frequently or live in a snowy country and you need the 4x4. It charges at higher rate (if the charger supports it) and often you don't need to go beyond 80-85% to go the same distance that RWD would do with 90-95% (takes ages when you go beyond 80%).
If your long distance driving is once a month or so - no point spending the extra 7-8k EUR. I went for RWD and am glad I made that choice
Standard range does not have a problem with charging to 100% and discharging to 10%. So in reality - with Standard range you are using 10-100% (90% of the capacity) and with AWD Long range you are using 20-80% (60% of the capacity). Meaning when staying in a comfort zones of 1 or 2 motor variants, you have a better range in RWD.
But you have more power in AWD - but it costs more.
Excellent video, thanks for sharing.
Very informative channel!
This is the best video I’ve seen comparing consumption . Surprised the LR is consuming more. I’d thought it would consume more or less the same but not 10% difference.
Now I need to find a video comparing the sound aspect.
Sound aspect? AFAIK Model Y RWD also has same speaker setup as Model Y LR. (at least in Europe)
The LR is heavier and the front motor is less efficient than the rear motor. So the difference isn't that much.
For some reason, when I read "winter," I was expecting snow and ice.
Too many Canadian winters I guess.
Still an interesting video.
Great video, thank you! Small correction: The Long Range Model is certified with 533 km WLTP. The value you quoted is just an estimate from the manufacturer.
I know you said that you try to avoid the difference in drag, but I would have love you to inverse drivers and positions half way the highway driving and halfway the city driving to really cancel the difference in drag and driver.
Discharge is not linear. It will get worse for LFP RWD, better for AWD. The total range at -2 ... +2 C for both cars is very decent, especially with the altitude difference - your city has quite a few hills and slopes, including highway entries and in-city driving altitude varies quite a lot. 300 km max range (extrapolated) for RWD with 360-370 km for AWD/LR. Take the highway out - you get 340-350 km vs. 400-410 km. Overall, thanks a lot for real world stuff, you would be amazed how difficult it is to find spot on content like this.
We recently did a range test with both. 100% to 2%. I'll post the video up in a few days 😁
LFP degrades slower, but constantly charging it to 100% is also not advisable because it degrades the battery. We charge LFP to 100% once a week because BMS needs it. If we charge YLR to 70-80% every day, we will have the same range as RWD and a negligible degradation, the same as YRWD. We know that we go on tour much less frequently. But with the YLR we can get additional range by charging it to 100%, which if done from time to time probably won't degrade the battery. Moreover, the 4x4 drive is what makes a big difference on wet or snow-covered asphalt. And of course the acceleration, especially after the boost :) Only LR for me!
You can charge it to 100% daily without increased degradation
@@lukewdk2482if it‘s not nescessary better don‘t charge and keep it sitting 100%.
But looks like even Tesla batteries have top buffers, so 100% are not 100%
Good job 👍🏻
Ambient lights are after market right? And what are the weel sizes?
Fain videourile voastre ❤❤❤
Thanks for the excellent video. Did you use the standard 19 inch wheels for this test?
Yes, stock wheels for both
Really good video, nice comparison etc. However question about your math, just checking a few of your percentage comparisons:
141/125=1,128 so 12.8% more consumption, while you write 11.4%
161/148=1,087... so approx 8,7% more, while you write 9.1%
I think you have swapped it the division, so in that case numbers are still correct, but then you have to say that RWD uses say 11.4% less energy than Dual.
I picked the RWD because of the cobalt free battery. Great cars either way.
what charging speed to you get on the RWD SR version if you don't mind me asking
Great comparison. Hard to justify the LR. Would love to see them do 200km then recharge to do another 200 on the highway. Which is better on a long road trip?
This test definatelly confirms my opinion. Each time I am asked what to choose between Model Y SR and LR, I always advise to pick the SR with the BYD blade battery, regarding range. Of course if performance or AWD matters, then you should go with the LR.
In winter driving the rwd is a little wonky on fresh snow. The LR does a great job at finding traction. But on regular roads you'll see no difference between them since roads are usually kept clear of snow
I like the approach on this. I believe the lfp battery from shanghai is from CATL and is 57,5 kWh. Are you sure the car with the LFP battery has a WLTP of 450km?
I have the 2023 RWD here in Norway and it works perfectly even if it's really cold (MINUS 20c) But sometimes I miss 4x4 due to it might be hard to get up some hills etc on icy roads. but the LR when it comes to pure range, is not worth the extra cost.
How did you get that purple light strip
I‘m still waiting for my MY RWD from Giga 4 with CATL battery, good to have your numbers to compare.
I‘m afraid it‘s gonna be 4 very long days until I finally can pick it up.
Hope tire compound is the same and psi is the same too
Fans need to cool down the battery aggressively after supercharging sesh.
So better to AC charge up to 100% for more accurate test
Great video really enjoyed it - and compares to what I have been saying. Funny how those that spent the extra spends all their time trying to convince themselves.
With the BYD LFP battery the RWD seems to charge significantly quicker holding the 177kw far longer, making even better.
Mulțumesc!!!!
or people with RWD version trying to convince themselves ?
This make sense guys, thanks! How equal are these two MY's in terms of battery degradation and totally driven km's?
There's 5 months difference between their build date. The RWD has 22,000km and the LR has 2500km.
So there might be some small degradation but nothing significant.
Super video! Felicitări! Scurt și la obiect. Îmi spui și mie de unde ai luat LED pt bord te rog ? Eventual un link? Arată super! Mulțumesc anticipat!
Mersi 😁
Da, ledurile is chiar faine că is digital deci au multe jocuri de lumina.
a.aliexpress.com/_EvbHnad
MYLR should be put in CHILL mode to be fair. 207wh/km is fairly high, my MYLR is getting 146wh/km (236wh/mi) for mixed highway local driving.
I would definitely choose RWD! It is the best choice for me, price / quality / performance. The LFP battery has a longer life and can be charged to 100%. I'm looking forward to ordering it.
Agree! We ordered a RWD, it has the best price - quality! And only 10% more range for the Long Range version is actually a bit disappointing.
I'm sure that you won't regret your choice.
@@Paul.Woodcraft Thanks!
They say LFP degrades slower, so it would be interesting to see the same comparison for the same cars in 6-7 years from now. In 15 months since owning the RWD version, I probably wanted (not needed) to have the AWD version maximum 2 times. For me it's not worth the 7k EUR extra.
You're in Germany, do you know which version of LFP battery is in the RWD version? We get the CATL LFP battery in Canada, I think you might have the BYD Blade battery (which would make me jealous).
Don't worry I'm jealous too lol
I have the CATL battery but the difference between them is pretty small so I wouldn't think you're missing out on anything. I had some thoughts that maybe I should've gone with the LR but after seeing how my brother's dual motor charges... I'm very happy with the RWD.
Both are in circulation in Europe. There is no reason to be jealous. Both have their advantages and disadvantages... it doesn't matter in everyday life.
What kind of ambiental light so you have? And at 100% how many km does it shows? I have same model similiar mileage
This is the ambient lighting kit I used
a.aliexpress.com/_Ev6Oejb
I don't really go by the range that shows on the screen since it gets things wrong often, I kind of got used to it and I know how far I can go. That being said it shows 430km when fully charged
Good video comparison. If your ok with the 0-60 speed & no snow, then the RWD is the way to go. I only know of the Model 3 RWD to have LFP batteries 🔋 in the U.S. In my opinion, I would get the LR. The RWD is like having an ICE car. It looks like you have the interior light trim on your Y, is that after market or are they delivering them like that in Giga Shanghai?
With winter tires snow was not an issue at all with the RWD. The interior trim light is just an led strip from AliExpress, easy and nice mod
In canada with a model y rwd, with Michelin Xice snow suv tires there are no issues with snow
TL;DR - Look for an "E" in the 7th place in VIN of your Giga Berlin built Model Y RWD. If it's "F" - you got yourself worse charging battery (BYD Blade > CATL)
If your car is from the Giga Berlin factory, check the 7th digit of your VIN (Vehicle Identification Number). Look for an "E" - that indicates a BYD Blade which is a battery known for its significantly better charging curve at DC fast chargers compared to the CATL battery (VIN with "F" in the 7th position). Both offer no differences other than charging. Range is the same.
If you care about it, here are some tips: for pre-built inventory cars, contact your local Tesla Center and ask about the battery type to make sure you are getting the Model You want. When placing a new order, when you receive a VIN, and it shows an undesired battery type, you might be able to get a reassignment of your VIN with another that is built with a battery you want.
REMEMBER - It ONLY applies to Model Ys built in Giga Berlin. Other factories will have different VIN designation and I'm not aware of those.
Did you install the LED Lighting on your dashboard?
Yes, it's a simple 5min process. Led was from AliExpress
Efficiency, rwd is more efficient. Not to mention long term, the rwd will have more range than the longe range due to degregation differences of the 2 chemistries.
In the USA we only have the LFP for the model 3, and i love that car. Assuming the 0-100km is 6.2 or less I would take the rwd. Some markets tesla has this almost at 7 seconds which is not fast enough for me.😂 I just prefer this chemistry because of its safety, durability, charging curve and longevity..
In europe the LFP model Y sadly has 6.8 seconds 0-100 ( 0-62mph) but it is plenty fast to get in trouble. I would say the LFP is a very balanced Tesla with no shortcomings compared to the dual motor.
@@Twin.motors totally agree. the 6.8 seconds matter only if you are drag racing but in real life scenarios e.g. overtaking or spirited fun driving - it's pretty damn good and easily keeps up with BMW's :)
No, the LFP will not have longer battery life used the same. NMC battery charged at 3.6V (~70% ?) will have the same number of cycles as LFP charged at ...3.6V (100%). No siginificant difference. Obviously, the NMC will also allow you from time to time to go higher and make longer trip. LPF at 100% last longer than NMC at 100% but because it is not comparable obviously.
@@jeanbaptistelabelle I honestly don't have the energy to explain how incredibly incorrect you are. Instead just UA-cam or goolge it. You will find, no one, absolutely no source, agrees with your statement. And there are plenty of legitimate sources discussing this.
@@jeanbaptistelabelle you know what, change my mind here is some basic math. LFP has a out 4000-5000 charge cycles compared to the nmc 1500 charge cycles before we get 70%, considered industry wide as end of battery life. A cycle is 0-100%, if it happens by you draining your battery 20% each day and refilling at the end of each day, after 5 days that is considered a full cycle.
Worst case LFP vs nmc long range.
4000 * 272= 1,088,000 miles.
1500 * 341= 511,500 miles.
We haven't even taken efficiency into this equation where we know the rwd LFP is more efficient and will give you more miles for less power.
Tesla recommends charging only the LFP battery to the max 100%. Other batteries up to max 80%. If you follow this advice, the standard range will go further.
My brother charges his Dual motor to 100% all the time, we'll see what kind of battery decrease he will have in a few months.
charging at 100% does degrade faster the LFP battery as well. It is advised to charge regularly (once a week ?) an LPF battery more for BMS calibrating reason because difference of voltage between full and empty is small. But NO, it is NOT better to charge it at 100%
@@Twin.motors which is silly to be honest. 100%-10% is giving 500 cycles (150'000km for 30% degradation). Charging only at 90% as a daily routine extends to 1500 cycles. And 80% to 3500 cycles.
It makes a HUUUUUUUUUUUUUUUUUUUUUUGE difference not to charge EVERYDAY at 100%. Obviously, it does not mean that you cannot charge at 100% when you need.
But going the extra effort of charging it EVERY DAY at 100% is silly for the residual value of the car. I do not understand the interest to do it for your brother with no benefit whatsoever.
Tesla does not recommend charging the LFP to 100%, in the charging menu also 80% is recommended. The BMS needs a full battery to read it, the battery never wants 100%. But degradation on high SoC is a little lower on LFP
@@t.d.5804 exactly. Max voltage is around 3.6V so it deteriorates similarly to NMC at 3.6V which is around 70% give or take. Said otherwise, LFP deteriorates the SAME as NMC for the same energy storage. It is just that NMC can store also more (and then deteriorates more)
daily driving puts LFP on par with AWD version since it's charging at 80 to 90%. Visually AWD is better but economically and logically, one should buy RWD LFP based on these tests (both charging and efficiency tests)
I never understood this argument. Do you drive 300km EVERY DAY ? In such case, you charge at 70-80% as your daily need and you charge it at 100% when you need the full range. Never understood this argument that we are restricted to 80% on an NCA or NMC battery.
People forget the advantage of a bigger battery :
- more power
- more regeneration
- more longevity : yes, an LFP is supposed to sustain more cycles to reach 70% SOH but...each cycle is 20-30% less range. More important is that LFP early curve degradation is higher than NMC as we can see on quick early degradation of the Standard Y and 3 models
- 30% faster charging
and obviously 20% more range (despite efficiency difference)
@@jeanbaptistelabelle don't know where you are getting that 30% faster charging from. Don't include super chargers. 7k for about 2 seconds faster acceleration, all wheel drive and 70 or so miles of range. Nah man. Best spending that money on a home charger, etc. You really don't need awd. Just saying
@@ravindrapersaud7608 Well, it gets 100km of range more 40% faster, but when you go until around 50%, where curve has already significantly drop, the difference is about 30%.
Before, people were paying more just to have better performance...and worse fuel consumption.
Here, you have 4 wheel drive, 20% more range, 20-30% faster charging, more performance, more longevity. I woud say that it is totally worth it. But obviously not everyone needs it.
@@jeanbaptistelabelleyou’re wrong with the 20-30 faster charging. Maybe at the beginning but after a certain percentage it charges slower than MY RWD. I have the BYD version RWD, from 10 to 90 % in 19-20 minutes, the charging curve is excellent. Even with the 250kw max on the LR, you will never charge faster than the new BYD LFP. I’m at 4k km, charging 3-4 times a week at 100%, 0 % battery degradation. Indeed the AWD is more stable on the road and snow, it’s faster, no doubt about that. But the 11k eur difference here in France between the 2, and for what? 2 sec faster speed and how many more KM? No thanks, I’m fully satisfied with my RWD, at this price is a real good bargain. And for the sound, here it’s the same audio system.
@@iona3165 This is true that the BYD has a very good charging curve and that it offsets quite some of the charging disadvantage. It recovers for instance 50% battery in around 15-16mn where as the Y with LG battery needs 17-18mn but it has recovered 23-25% more range so the difference is smaller in terme of range recovered at the same time even if at the advantage of the LR.
Also, as you say, the sound system is the same so there is not this difference (although this could disappear from what we see now coming on the new Propulsion).
But let's not forget that the BYD charge fast but has also 2kWh less than the CATL version so 4% less range again.
I agree that it is a great version but you cannot be sure to get the BYD version when you order as people starts receiving the CATL from Berlin as well.
Again, I have the feeling that people having the RWD (Y or 3) feel the needs to convince themselves that the LR does not bring advantage. It does.
Range is one. My wife is going every week to Mulhouse so a 300km round trip more or less, with a lot of day driving there, cold start where you need to warm up the cabin again.
She can do it with the LR (the 3), with 20% range left in summer but sometimes less than 10% in winter or long day.
With a Y ? RWD ? Forget it. She would have to start EVERY single time like she had to with my previous S 75D. And she is something that really bothered us a lot. Really.
Also, on long trip, at french highway speed, more than 25% more range at 130km/h. When the Y will barely do 300km (so with a little bit of marging, you will have to stop around 2h driving and at 260-280km in very best case), the 3 LR (yes, I know, there is the form factor as well) will do 380km. So it is one hour more drving and / or a much smaller stop like 5-10mn to be able to make 500km before a lunch or dinner break. The Y RWD will ask 30mn stop which is quite an annoyance.
So for me, even worse for the Y, the RWD is a clear no go. It is just the threshold I do not want to live with anymore after 5 years of experience with the S75D where I suffered too much of the range.
But to each its own really.
Dual motor consumes more power becuase the Front motor is an induction motor, that uses power even cruising so less efficient than RWD with only have permanent magnet motor.
Why doesnt my new Model Y have inner ambient lighting like yours
I added it separately. It's a kit from ebay
Since the LFP one is much cheaper, lasts much longer, has no rare earth mineral in the battery and has almost the same range ... no question, RWD is the way to go.
Lots of people get hung up on the awd and faster acceleration aspects. I really don't think that's worth 7k though
Maybe a slight draft effect for the following car.
Make an test with Tesla Model Y SR RWD vs the new Tesla Model Y LR RWD, that would be very interesting 😊
Are you referring to the Model 3 highland RWD?
@@Twin.motors No not Model 3, Model Y !
Yes please do @twin.motor said, for I just purchased the 2024 long range RWD model y..
@@younged510 we just finished a test the other day, we'll be posting the video this week I hope. ( Spoiler, if you have the RWD you made the right choice 100% 😁 )
@@Twin.motors yes please post I am waiting on my 2024 rwd model y long range...
just wondering in the depths of youtube to find such a video like this on the comparison of both model. Tesla just launched RWD in Türkiye and the price between RWD and LR is almost 25-30k euro due to insanely hight tax (%40) on LR. the RWD is %10 tax. great deal for people in Türkiye.
Get the RWD you won't regret it. ( The LR is faster, that's the only benefit but range isn't significant in any substantial way )
@@Twin.motors already did mate. Thank for the video. It is “THE” video that people in Türkiye is craving for right now.
Tres bon comparatif et instructif, merci. j'aurai aimé voir l'essai aller jusqu'à au moins 15-20 %, s'arreter à 58% pourquoi ?
Test à faire : on dit que la LFP peut se charger à 100%, et la NCM à 80 % au quotidien : çà donne quoi en temps de recharge et pour xxx kmw ????
L'idéale, une LR propulsion uniquement, dommage que tesla ne le propose pas !
Oui, meilleur combo!
I wish Tesla would add the option to just order more motors. It would be rad if you could order the cheapest model Y and then just add another motor for $2k instead of paying 7k for batteries you don't need.
Honestly the Y rwd is very clearly nerfed through software. A ID4 that weighs more and has less HP has a faster 0-100 time. There's a drag Race video I uploaded against a 80hp eUP and the Y rwd can't beat it up until 70km/h.
I'm hoping a performance mod or software DLC will be available in the future.. don't need much, just a little faster from zero.
Difference is easily explainable: air tunnel. U always drove behind LR
I mentioned in the video that I kept a very long distance. There was no drafting of any kind
The air tunnel is maybe a maximum of 2 meters behind the vehicle, and it has to be a large vehicle, for example, a truck. There is no chance for an air tunnel here.
@@barteksful - u r totally wrong
Nobody drives 2m behind a car ahead. Air is rarefied to some extent and 100-200m tunnel is made.
Of course, Y rwd definitely is more economical than LR
The second test with rwd ahead would prove I’m right.
@@michawu4401 "To debunk this myth, scientists from the University of California played a significant role. In the document titled "Effects of Highway Slipstreaming on California Gas Consumption" (available here), they point out that savings do exist, but one would need to literally drive bumper-to-bumper behind a truck.". So, just as I mentioned earlier. Read this study for yourself.
@@barteksful - ok. Scientists…
Practical issue: What about retesting both Ys on the same route but in a reverse order ? Consider it to satisfy your viewer’s curiosity yet u r certain it’s nothing.
It’s your turn! I’d watch such a video if it weren’t a trouble.
Cred ca putea-i sa spui in 3 secunde ca locatia e zona Cluj.....dadea putin bine ca imagine! In rest ok.
I bought the RWD / Standard Range because of the price. I was wary of RWD traction since it can fishtail on slippery surfaces but the traction control is incredibly fast and efficient. I cannot get the rear of the car to drift more than 10-15 cm laterally..
Long range qualifies for $7500 off, RWD cheaper car doesn't qualify. So actually a Long range, way faster car, with more range and premium stereo COSTS LESS! Guess which one I bought recently.
That's US only I'm afraid
For the rest of the world the RWD is significantly cheaper
@@Twin.motors Works for me. This is why Dual motor Model Y is selling like crazy in the US. I recently bought one from Inventory with 5 miles on it, for under $43K total. Love the car!
@@joegibbs2508 that's a very good price. That's what the RWD sells for in Europe. I'd love the extra power of the Dual motor but the RWD is still quick enough to get you in trouble 😂
Are you actually romanian? Your accent is too good😅
Born in Romania, grew up in Canada and now back in Romania 😁
Rwd too close behind Awd on highway. Less air resistance.
We kept a very long distance between each other. Based on previous studies you'd need to be under 2 car lengths away for drafting. We were 10 car lengths away and we did shift roles, the RWD was the lead car as well.
@@Twin.motors Ok. Then the measurement is valid.
Amazing so easy people are to impress... did no one notice the RWD was driving behind the long range, all the time... I wonder how it would look, if they switched positions (hypermilling).... but yes, RWD have so good range now, that long range is only interesting for performance and road grip (especially at winter). RWD is also cheaper in insurance !
We kept alternating in who was the lead car but we also kept a very long distance, drafting happens if you're literally a few meters / feet behind the car in front.
@@Twin.motors On the Myth busters show, they showed that even if a driver is 100 feet behind a semi, there was an 11 percent reduction in fuel consumption.
@@waylandchau9431 I imagine if the "footprint" of the vehicle is smaller the impact would be much smaller. In this case a Model Y probably has a 4x smaller footprint than a semi in terms of aero. There is a possibility it affected it a little bit but we did another test today and we kept a massive distance and got similar-ish results. Will post the video up in a few days
s @Twin.motors Definately not my experience driving daily 2 hours to and from work.... nice economy can be expected, also at 300 feet at highway speed. The slower it goes, the less impact.
At these speeds, driving the RWD behind the AWD, at so short distance, the drag will help to lower consumption to the RWD. It is not a fair comparison.
We alternated positions and we kept a very long distance between us. According to research you need to be a few meters away from a car in front to affect drag at all.
about drag: as you mentioned few meters or more like 70 meter or so, place your self near a road and feel the drag from cars