After the debut of the diesel Bentayga, packing a triple-charged 4.0-liter V-8 engine generating 429 hp, there was really only one unexplored powertrain option for Bentley's luxury tank: a hybrid.
A plug-in hybrid Bentayga is indeed in the works, and prototypes have been spotted testing in the UK, Auto Express reports. Yes, ultimately this means the Bentayga will be able to take advantage of diamond lanes reserved for electrics and hybrids, traveling along with Toyota Priuses and Nissan Leafs.
Don't write off this version just yet. The prototype Bentayga has been testing with a powertrain borrowed from sister brand Porsche's Cayenne S E-Hybrid, which pairs a 3.0-liter twin-turbo V-6 making 333 hp with an electric motor producing 95 hp, for a total system output of 416 hp in the current Cayenne.
We would expect a production version to use the newer 2.9-liter V-6/motor combination from the new Panamera E-Hybrid, generating a combined 462 hp with the help of a 100-kilowatt electric unit.