Kage no Jitsuryokusha ni Naritakute! - Ch. 66.2

[E421T]

I realised I forgot everything that happened in V6...

So, basically, very simplified, what happens in the V6 is that a Mixture of Fuel and Air is combusted by igniting it with a spark plug, the pressure from this reaction pushing out the piston.
The kinetic energy of the piston is transferred to the engine shaft, which is connected to the transmission.

 

[breizh]

He's so right. Apple juice is peak.