The straight-five engine is a piston engine with five cylinders mounted in a straight line along the crankshaft.
MAN B&W 5S50MC 1,865 litre marine diesel engine
An Audi 2.3 NG engine, mounted longitudinally
A Volvo B5244S engine, mounted transversely
The OM613 is a turbocharged straight 6 diesel engine produced by Mercedes-Benz. It is the successor to the OM606 and was replaced by the OM648 engine in 2003.