Engine : 4-stroke, Parallel Twin, DOHC, liquid-cooled Displacement : 399cc Bore x Stroke : 70.0 x 51.8mm Compress...

3.0L F1 W24. Revs to 16.5k RPM. 8-speed transmission.

When an inline 5 and inline 6 kiss.

Like 2 opposed inline 7s. Even-fire.

Very unique sounding engine. Like a mix of V10, L6, and L4 all together.

A V20 with 4,600 HP.

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?