Straight-four engine
Videos
A straight-four engine is a four-cylinder piston engine where cylinders are arranged in a line along a common crankshaft.
Diagram of a DOHC straight-four engine
2008 Yamaha YZR-M1 MotoGP motorcycle engine
2006-2009 Nissan M9R diesel engine
Mitsubishi Silent Shaft display
Alfa Romeo Twin Cam engine
Videos
The Alfa Romeo Twin Cam engine is an all-alloy inline-four engine series produced by Alfa Romeo from 1954 to 1994. In Italian it is known as the "bialbero", and has also been nicknamed the "Nord" engi
Alfa Romeo Twin Spark engine