The Story of Fast Diesels

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Lately big brands have really slowed down the development of the diesel engines, as the emissions regulations have gotten a lot stricter, but there was a time when emissions and ecology were just concepts on a piece of paper, and diesel was actually considered a lot cleaner than petrol.
The 2000s were the golden era of diesels as the technology advancement was at its peak and manufacturers were racing towards making the fastest diesel. But before we touch the golden era, let’s go back when it all started.
The first diesel engine was produced in 1893 and was used in heavy duty vehicles right away, but It wasn’t used in passenger cars until 40 years later.
The Mercedes 260D, internally known as the W138, was the first diesel production car, it was powered by a diesel 4 cylinder engine with 2.6 liters of displacement, producing a colossal 45 brake horsepower.
The 80s and 90s proved to be crucial for the diesel engine development as a series of technological advancements were made, both in the manufacturing and in the engine electronic controls.
Toyota introduces a microprocessor-controlled engine control unit for Diesel engines also known as the ECU,
Mercedes introduces the electronically controlled injection pump,
Fiat makes the first mass produced car with a direct injection diesel engine,
then Audi introduces a turbocharged, intercooled, direct-injected, and electronically controlled diesel engine.
BMW wins the 24 Hours of Nürburgring with a modified E36 that had a 2 liter diesel engine that produced 240 horsepower and averaged during the race a fuel consumption of only 23 liters/100km which was half of the fuel consumption that the petrol cars had.
The start of the new century marked the golden age for diesel cars, as the upcoming years would result in the craziest diesel engines we will ever see.
The thirst for diesel torque from customers was increasing, this led to the Germans to mass produce V8 diesel engines.
What’s crazier it’s that this isn’t the biggest or the most powerful diesel engine, but before we go there, let's stop in Munchen, where BMW released the first twin turbocharged straight six diesel in 2004. The M57 was a 3 liter 6 cylinder diesel engine and with the help of two turbos it was able to produce almost 290 horsepower and 600 newton meters of torque, which wasn’t far off the Volkswagen V10. This engine made a huge impact in the car world, and led the way for all the modern diesel engines to come. It was the first engine that could have a fuel economy of less than 7 liters per 100 kilometers while producing 600 newton meters of torque.
In the meantime Audi decides to take the diesel engine to the racetrack,dominating the 24 Hours of Le Mans in 2006, winning 36 out of the 48 races it took part in, showcasing the capabilities of the diesel engines.
To commemorate this insane success, Audi does the most logical thing and puts a v12 diesel inside a family SUV, creating a monstrosity with 4 wheels. The whole car weighed 2.7 tons, normally all this weight would be very difficult to move around but not here, as the 6 liter v12 diesel produced 500 horsepower and 1000 newton meters of torque, which is more torque than most supercars today.
This would be the end of the diesel golden era as fuel emission regulations got way stricter, making car manufacturers ended production of any diesel engine with a bigger displacement than 3 liters.
The last true innovation towards the development of the diesel came from BMW, strapping not 2 but 4 turbos to a 3 liter 6 cylinder diesel engine producing 400 horsepower. Recognisable from the 50d badge, this crazy engine was powering BMW’s biggest cars like 5 and 7 series , and SUVs like the X5 and X7.
The final blow to the diesel engine came in 2015 what EPA found that Volkswagen Group had installed software in its diesel engines to cheat on emissions tests. This software, known as a "defeat device," could detect when the vehicle was undergoing an emissions test and would activate full emissions controls only during the test.