Skip to main content

The end is near for Bentley's most historic engine

Bentley 6 3/4 engine
Image used with permission by copyright holder
The big V8 engine that powers Bentley’s Mulsanne flagship traces its roots all the way back to 1959. The eight-cylinder has been comprehensively updated over the past couple of decades, but the British marque has announced that it’s now living on borrowed time.

57 years ago, Bentley’s L-Series V8 launched as a 6.2-liter naturally-aspirated unit fed by a pair of carburetors. It initially powered the ultra-luxurious S2, and the equally-opulent Silver Cloud II that was built by sister company Rolls-Royce. The mill gradually evolved into a 6.75-liter — six and three-quarters in Bentley-speak — unit fed by a pair of large turbochargers. Currently, it develops 505 horsepower and 752 pound-feet of torque in its initial state of tune, though buyers who require more grunt can order a tweaked version of it with 530 horses and a mighty 811 pound-feet of twist.

Technology is advancing at a neck-snapping pace. While it’s technically possible to continue spending money on making the eight-cylinder cleaner, more powerful, and more efficient, Bentley boss Wolfgang Dürheimer recently told Car & Driver that the historic V8 has found its “final home” between the front fenders of the current Mulsanne. The next-generation model will adopt a 12-cylinder engine for the first time ever. Whether it will downsize and adopt the same 6.0-liter W12 that’s found under the hood of the Bentayga or use an entirely different engine is anyone’s guess at this point.

Read more: Bentley’s Mulsanne flagship might lose its lid after all

The entire Mulsanne range received major updates inside and out for the 2017 model year, so Bentley’s range-topper and the famous six and three-quarters that powers it aren’t going away any time soon. While details about the next Mulsanne are few and far between, Car & Driver speculates that it’s at least five years away from hitting showrooms.

Editors' Recommendations

Ronan Glon
Ronan Glon is an American automotive and tech journalist based in southern France. As a long-time contributor to Digital…
Mercedes-Benz G580 first drive: old-school off-roader goes electric
2025 Mercedes-Benz G580 from three quarter view.

American car buyers mostly know Mercedes-Benz as a luxury brand. But for decades, the automaker has also produced the tough, rugged G-Class (also known as the Geländewagen or G-Wagen), an SUV not afraid to get its leather upholstery muddy. And now, this iconic Mercedes is going electric.

The 2025 Mercedes-Benz G580 with EQ Technology — the final name of the SUV previously known as the EQG — isn’t the first electric off-roader. The Rivian R1S and R1T and GMC Hummer EV have proven that electric powertrains and off-roading are a great combination. But the electric G-Wagen is different because it’s based on an internal-combustion model — and a very traditional one at that.

Read more
Honda believes hydrogen semi trucks will make the case for fuel cells
Honda hydrogen fuel-cell semi truck.

Honda remains committed to hydrogen fuel-cell vehicles, but the market for those vehicles remains limited. So Honda is looking at other uses for fuel cells -- including commercial trucks.

To show how that could work, Honda converted a semi truck to fuel-cell power, replacing its diesel engine with three fuel-cell modules. Together, the three modules produce a combined 321 horsepower, and can propel the truck to a top speed of 70 mph. There's enough onboard hydrogen storage capacity for a 400-mile range with a full load, Honda claims.

Read more
Mercedes-Benz G580 vs Rivian R2: Is the much cheaper Rivian actually better?
2025 Mercedes-Benz G580 from three quarter view.

Mercedes-Benz has finally taken the wraps off of the new "Mercedes-Benz G580 with EQ Technology." Yeah, it's a mouthful, but it's basically a new electric G-Wagon. It looks a lot like the G-Wagon you know and love, but with an electric powertrain and a battery. It's not the only electric SUV out there, however, and there are some great ones -- like the Rivian R2.

Both the Mercedes G580 and the Rivian R2 have a lot going for them, but they also approach the electric SUV slightly differently. Is one better than the other? I put the two head-to-head to find out.
Design
The approach that the two vehicles take to design is quite different -- and you might like one better than the other.

Read more