Straight-seven engine

A straight-seven engine is a straight engine with seven cylinders. It is more common in marine applications because these engines are usually based on a modular design, with individual heads per cylinder.

Marine engines

Straight-seven engines produced for marine usage include:

Wärtsilä-Sulzer RTA96-C two-stroke crosshead diesel engine
Wärtsilä 32 trunk piston enginesMAN Diesel IMO two-stroke crosshead diesel engine Burmeister & Wain 722VU37 two-stroke diesel engine.
English Electric English [Electric diesel engines#Variants|7SKM] diesel engine

Land use

The AGCO Sisu 98HD is a straight-seven diesel engine that was released in 2008. Intended for farming machinery, the engine shares various components with the company's straight-six engine.