Why V4 engines are so rare and which cars use them
The V4 engine is such a rare layout in a road car, being found predominantly instead in motorcycles.
I've investigated how the V4 engine works and why it is so rare, as well as researching the ultimate use of this rare engine, the Porsche 919 Hybrid LMP1 car. 720bhp from a four-cylinder engine?
I'll take that any day.