Multiples of 7 make the best engine sounds.

Basically 2 inline 9s on 1 crankshaft. Power stroke every 40° of rotation makes it pretty smooth.

A straight (inline) 16 cylinder with a cross-plane crankshaft.

A V14 with a "mirrored" firing order.

A 67.1L 2-row radial 22.

A V34 with 15,820 HP. Can hit Mach 1.25

Overkill 5-bank W35. Make sure your computer can handle it!

32-cylinder VR engine. Some additional tuning may be needed.

The world's first Inline 13 engine?

The super-rare Ford V12 tank engine that powered the T-29 Heavy tanks. Only around 4 engines were built. The engine f...

A huge 18L 60° V8 that powered the Sherman tanks of WW2. The engine file has been improved from the original YT video...

A flat 10 with an even firing order.