RAC Cars News


First Bentley with a diesel engine

By raccars Published


Bentley’s first Bentayga production car with a diesel engine is due to be rolled out

Next month’s Paris motor show is expected to coincide with a major Bentley revelation; the lowdown on its first car with a diesel engine. Bentley has finally bowed to rival and customer pressure and is preparing to roll out its first ever diesel production car.

More official information on the diesel engined vehicle is expected in October but speculation is rife as to what it will feature and what it will do.

The diesel Bentayga

The model featuring this landmark diesel engine is to be the heavyweight Bentayga luxury SUV, which Bentley only recently launched.

The Bentayga TDI was recently spotted out on the road, complete with its V8, 4.0-litre diesel engine which is the same unit used in the Audi SQ7. The SQ7 version has an electrically driven centrifugal supercharger and twin turbochargers and can achieve 664lb ft and 429bhp. It is expected that Bentley will increase the output in order to justify a higher price tag.

The Bentayga diesel will also share other elements with the SQ7 - and its regular version - including the 48-volt electrical architecture and the same underlying platform inspiration.

Why is the time right for a diesel engined Bentley?

There are various potential benefits including lower fuel consumption and claimed CO2 emissions, together with extended range thanks to an increase in fuel tank size. There’s also lots of low end pulling power.

This all makes sense when it comes to powering a large SUV at the luxury end of the scale. The engine seems to be the only significant change to this particular Bentayga model, with few visual cues other than different exhaust tips - if the spies are to be believed.

The Bentayga has made a name for itself as Bentley’s first off-roader and has already proved to be ground-breaking in employing the firm's first electric-petrol hybrid plug-in drivetrain.

A report out last month indicated that the oil-burning version will have an EPC or electric-powered compressor, which will be fed by a 48-volt electrical system. This EPC aims to entirely eliminate turbo lag, which is the delay caused by the need for a traditional, exhaust-driven turbo to spool up in response to throttle demands.

The electric turbo, which should also improve efficiency, will work together with two standard turbochargers which are mounted in between the car’s cylinder banks. This should offer a significant power boost at all levels in the rev range.

When this turbodiesel engine is located behind the gaping grill of the Audi SQ7 TDI, it creates more than 660 pound-feet of torque. And more power is believed to be coming, thanks to the work of Bentley’s engineers.

It is thought that the Bentayga diesel will be able to go from 0 to 60mph in around 4.5 seconds and will have an electronically-limited maximum speed of 155mph, making it slightly slower than its W12-powered counterpart.

It is possible that European deliveries of the Bentley Bentayga will start before 2016 ends, whilst the American market is not expected to get the diesel engined version.

Background on the Bentayga - before the diesel engine

The original Bentayga is built at the Bentley factory in Crewe. In June 2016, it was hailed as the fastest production SUV on the planet, thanks to its electronically-limited maximum speed of 187mph.

Both the Bentayga and the Audi Q7 (second generation) are based on the MLB platform from the Volkswagen Group. The same platform is also being used in the Lamborghini Urus, the Volkswagen Touareg and the third-generation of the Porsche Cayenne.

The Bentayga is an evolution of the Bentley EXP 9 F concept vehicle of 2012 and was officially revealed at September 2015’s Frankfurt Motor Show. Production started on November 27, 2015.

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