Bentley engines are some of the biggest, most powerful old-school units on the market, and that's not about to change. This, despite earlier reports that Crewe was considering utilizing diesel engines or even the powerplant from the Bugatti Veyron, which now appear off the table... in the short run at least.
Although Bugatti and Bentley are now united under common leadership, Bugatti is rumored to be working on its own luxury limousine, so shoehorning its engine into the production Arnage could cut down its legs prematurely. As for the diesel, Bentley's position remains that customers aren't ready for oil-burning Bentleys at this point. In the short term, then, Bentley customers will just have to make do with 6.75-liter V8s and 6-liter W12s. Dang.[Source: Autoweek.nl]