W engine

[5] The Feuling W3 is a 2.5 L (153 cu in) motorcycle engine that was built by an aftermarket parts company in the United States in the early 2000s.

[7] The Rumpler Tropfenwagen had a Siemens and Halske-built[8] 2,580 cc (157 cu in) overhead valve W6 engine, with three banks of paired cylinders, all working on a common crankshaft.

A three-bank W12 design was also used unsuccessfully by the Life F1 team in the 1990 Formula One season, failing to qualify at every race.

The W16 type of engine can also be found in the Bugatti Veyron, Chiron, Divo and their related models.

[10] The W18 layout is rarely used, with the only production examples being several aircraft during the 1920s and 1930s, and CRM Motori SpA marine engines.