That hasn’t been long since the very idea of a diesel-powered Bentley VEHICLE would have been regarded as the sort of heresy that gets angry mobs illuminating their flaming torches and heading for the creepy castle. Yet the 2018 Bentley Bentayga Diesel is a thing–albeit the one which will be denied to us–and after driving it in the United Kingdom, we can report that the new engine suits the luxurious beast almost flawlessly.
The delay between the time an automaker signals off on an investment and the fruit of that spending reaches the market plays an essential part in this oily Bentayga’s story. The triple-boosted V-8 TDI formerly was designed to come to North America in the Audi SQ7 that stocks it, and it was engineered to meet all appropriate federal standards. Nevertheless then Dieselgate happened, and the Volkswagen Group made the decision that none of its brands would sell anymore compression-ignition engines on this side of the Ocean. Therefore the 2018 Bentley Bentayga Diesel discovers itself on the long set of Awesome Cars Illegally Denied Us.
2018 Bentley Bentayga Diesel Engine Specifications
This is a disgrace, mostly because this might well be the greatest compression-ignition engine ever suited to a passenger vehicle. Technically, the propulsion unit is the same to that in the Audi SQ7, meaning that 2 weeks . V-8 displacing 4. 0l and has sequential turbochargers that use a clever variable-valve system to bring the second turbine on boil. These are further assisted by a 48-volt electric supercharger, which is basically a 9-hp motor that sits downstream of the intercooler and can spin a centrifugal-flow compressor up to seventy, 000 rpm in less than a quarter of a second to reduce turbo lag to the barest level of detectability.
The result is an engine with a character similar to that of the old turbocharged 6. 75-liter pushrod gasoline V-8 that Bentley formerly installed in vehicles including the Arnage. Like that six-and-three-quarter-liter engine, the TDI isn’t built to revolution, although it pulls on traget to its limiter at 5000 rpm. It does indeed generate enormous low-down rpm, delivering the height 664 lb-ft over a wide music group starting at just one thousand rpm.
Yet the diesel powered also manages to be more refined than their gasoline grandfather ever was, emitting nothing louder than a purposeful growl even under the hardest use. The biggest difference is gas efficiency, which is not likely to be much of an issue for everyone with the considerable wherewithal needed to fund any 2018 Bentley Bentayga Diesel purchase, but it’s still a neat party trick. If this were accredited by the EPA, we estimate it would get about 26 mpg on the highway–a figure that, with the 22. 5-gallon energy tank, gives the Bentayga diesel a range that can fairly be described as Continent crushing in conditions of geographic reach.
The torque peak is similar to that quoted for the W-12 version, although that’s more likely digitally restricted to the skills of the eight-speed automated transmitting rather than a spooky coincidence. Whilst the diesel is significantly deficient in power by comparison–its 429-hp rating is 171 shy of the W-12’s output–it lacks little in real-world pace. Or perhaps, indeed, absolute speed: Bentley quotes a 4. 6-second zero-to-60-mph time. (We recently ran the W-12 model to 60mph in 3. 6 seconds against a claimed 4. 0 secs to 60. ) The diesel’s max speed of 168 mph likewise is some way off the W-12’s 187 mph, but we suspect that owners will rarely feel the absence. It’s also worth noting that we experienced not one of the surging or lag we detected when we analyzed the W-12; on everything except cylinder count and peak output, this is the better engine.
2018 Bentley Bentayga Diesel Exterior
The rest of the dynamic experience is near that of the 12-cylinder model. Driving manners are exemplary, with the air springs and adaptive shock absorber delivering a ride quality that isn’t quite as imperious over bumps as that of the Q7, though cruising refinement is good enough to make you suspect hearing loss. The “2018 Bentley Bentayga Diesel” is capable of making ample grip when called after to do so (in our test of the W-12, we measured 0. eighty five g on the skidpad), and it is amazingly playful nearby the limit. Responses are linear and correct, although there’s never any doubting the Bentayga’s mass.
Bentley says the diesel-powered is slightly heavier than the W-12 thanks to the iron block and the additional supercharger. Those pounds become most apparent when slowing down–or, rather, when not. The transmission has a sail mode that declutches when the car coasts, and the 2018 Bentley Bentayga Diesel feels as if it could roll several miles on nothing more than its own momentum. We all tried using the transmission’s manual mode to lock it into eighth products, which created a much more natural-feeling deceleration curve but also proved that the engine will pull cleanly from just 1000 revoltion per minute.
2018 Bentley Bentayga Diesel Interior
While the Bentayga’s interior feels appropriately special, specially when trimmed with the blend of tan leather and light woodwork that only the British appear capable of pulling off, the exterior design still is likely to divide thoughts and opinions. The Bentley’s visual mass seems somehow larger because of to the acreage of chrome grille and a not totally successful attempt to add Continental GT-style muscle to the backside haunches. A close inspection reveals some surprisingly proletarian touches, including a couple of exposed screw heads in the front bumper’s lower intake grille.
The infotainment system also deserves some mild chiding. It’s a Bentleyized version of the previous-generation Audi system, and although completely enough it feels old and to some degree clunky. Strange that the $200, 000 car that sits at the top of the Volkswagen Group’s SUV hierarchy has a system that’s substandard to the one in its $100, 000 cousin. The newest Continental GT is transitioning to a version of Audi’s current class-leading MMI, so it is likely the 2018 Bentley Bentayga Diesel follows shortly behind.