Very few engines have a long history of powering various vehicles - the small-block Chevrolet V8 and the Buick 3.5L V8 that would be used in a number of British vehicles. Another one can be found under the hood of the Bentley Mulsanne, the 6.75L (6 and 3/4 in Bentley parlance) twin-turbo V8 can trace its roots back to 1959. But the final curtain call for this engine is coming.
Bentley CEO Wolfgang Dürheimer told Car and Driver that the V8 has found its “final home” in the Mulsanne. The next-generation Bentley flagship would switch to a 12-Cylinder (most likely a W12 one). Keep in mind this isn't likely going to happen until the next decade as the Mulsanne recently underwent a refresh.
This isn't the first time the V8 - known as the L-Series - has been shown the door. Back when BMW owned Bentley in the mid-nineties, the automaker dropped the L-Series V8 and replaced it with one of their own with the new Arnage. Volkswagen would snap Bentley up in 1998 and would bring back the L-Series for the Arnage in the Red Label. The BMW V8 would stick around in the Arnage Green Label. However due to poor sales of the Green Label, Bentley dropped it - engine and all.
Source: Car and Driver