[citation needed] VW Group engines are commonly known by the type of fuel they use, their displacement, and their rated motive power output.
[citation needed] Volkswagen's inline-four-cylinder diesel engine (D) started out life as the gasoline-fueled EA827 series.
This engine started as a straight-five-cylinder Audi diesel in 1989 (itself derived from the EA827 series), but got reduced to an inline-four-cylinder for Volkswagens use.
It started as an Audi-designed engine and spawned straight-five-cylinder, diesel, crossflow, turbo, supercharged, and 16 valve variants.
The result of needing to site both spark plug and fuel injector meant that the former five-valve layout had to be changed to a four-valve-per-cylinder arrangement.
Volkswagen most recently came out with a new five-cylinder developed (loosely) from half of a Lamborghini Gallardo V10 engine.
[citation needed] Volkswagen used a conventional V6 engine in the B5 Passat, because the drivetrain was longitudinally mounted.
It was a test bed for the W engine technology, which made it into the W12 (listed below), and the W16, as used in the 406 km/h (252 mph) Bugatti Veyron EB16.4.