Bentley CEO Wolfgang Dürheimer told Car and Driver that prototypes of the diesel are already up and running. The diesel could be an all-new engine, but will likely come from Volkswagen’s already extensive lineup of TDI motors, with the new Audi V8 diesel being the most likely. The 3.0-liter V-6 TDI would be too small for the English luxury brand, while the V-12 TDI is not being brought up to new emissions standards, and will be phased out soon.
Dürheimer also revealed that the classic 6¾-liter V8 found in the Mulsanne is being axed. Within the Volkswagen group, Bentley is aiming to be the poster boy for V12′s, and a V8 powered flagship would mess up the plan. The 6¾-liter has a long history, first appearing in a Bentley in 1971. Arguably the most famous British V8, the 6¾-liter is the third longest lived engine still in production.
This decision comes after Rolls-Royce customers said that they would never buy a diesel powered Rolls. That said, the diesel route has been a success story for Porsche, a result Bentley is trying to replicate.
[Source: Car and Driver]