MAN A21 Lion's City CNG audio

Brutal engine sound of an A21 NL273 CNG MAN bus.
The audio was recorded in one of the buses of Keolis Nederland (former Syntus Gelderland) between Wageningen and Station Ede-Wageningen on bus line 86.
On the photo you can see the same bus in Breng, regio Arnhem colors. Illustration.
Both the photo and the audio belong to me.