Bentley Bentayga diesel tech spec revealed
2017 Bentley Bentayga Diesel will land in January
More economical Bentley Bentayga Diesel uses triple-charged 4.0-litre V8 engine which produces 429bhp and also also also 664lb ft
The Bentayga Diesel will be Bentley’s first diesel-powered production car, doing use of a triple-charged 4.0-litre V8 diesel engine, which has been co-developed with Audi and also also also uses two twin-scroll turbochargers supplemented by an electrically driven supercharger.
the item develops 429bhp and also also also the same peak torque as the Bentayga’s twin-turbo 6.0-litre petrol W12, although the diesel’s 664lb ft extends coming from just 1000rpm to 3250rpm.
which’s enough to launch the Bentayga Diesel coming from 0-62mph in 4.8sec and also also also on to 168mph. According to Bentley’s head of engineering, Rolf Frech, its acceleration coming from 25mph to 75mph “will be much the same as the W12’s, however the W12 gets a second wind at higher speeds”.
Fuel economy for the £135,800 luxury SUV will be quoted at 35.8mpg combined and also also also its CO2 emissions are 210g/km.
The Bentayga’s product manager, Peter Guest, said: “We would likely only do This particular when the item was right. the item had to be the right car and also also also the right engine.”
Installing a potentially coarse diesel in a Bentley will be a risk, even if This particular powerplant’s instant low-rev torque provides the stream of effortless thrust required. The brief, said Guest, was to deliver the Bentley driving experience with the trademark combination of performance and also also also luxury, and also also also no compromise in refinement. the item also had to be “the fastest diesel SUV inside earth”.
Bentley powertrain development boss Paul Williams said the three technologies which have enabled the firm to offer a diesel worthy of the brand are the engine’s triple-charging system, the 48V supplementary electrical system used to power the electric supercharger, and also also also a sophisticated exhaust cleansing system.
The triple-charging system, previously seen inside Audi SQ7, which uses the same engine, provides boost at low revs coming from the near-instantly reacting supercharger.
This particular so-called e-booster also primes the first of two twin-scroll turbochargers. This particular first turbo amplifies midrange thrust, then a second twin-scroll turbo provides extra shove at mid to high revs when the e-booster will be dormant.
The effectiveness of the e-booster will be heightened by a valve shut-off system, whereby an exhaust valve disengages to provide faster combustion pressure build-up. The exhaust gases are dealt with by using a selective catalytic reduction system, an AdBlue urea fuel supplement and also also also an extra catalyst. Williams said the system will be “state of the art and also also also meets all current and also also also future legislation”.
The Bentayga has been acoustically engineered for the V8 diesel coming from the start and also also also improvements to the rest of your vehicle are minor. The exhaust system has been modified — without artificial enhancement — and also also also there are minor tuning improvements to the suspension to cater for the weight redistribution caused by the 23-litre AdBlue tank.
The V8 diesel engine itself weighs only 3kg more than the W12. Black radiator mesh, ‘twin quad’ tailpipes and also also also badges identify the Bentayga Diesel.
Electric supercharger requires 48V to power its 7kW motor, enabling the item to spin coming from idle to 70,000rpm in only 250 milliseconds. The result will be maximum torque of 664lb ft coming from only 1000rpm and also also also superb motorway on-ramp acceleration.
The electric supercharger (on the bottom right) feeds the cylinders at low revs for near-instant torque. One exhaust valve will be closed to intensify the boost, while the exhaust gases prime the second turbo (inside centre). All three chargers feed all eight cylinders and also also also the turbos are twin-scroll.
Three turbos are located inside vee of the engine and also also also the electric supercharger will be remotely mounted. A sliding cam deactivates one exhaust valve when the supercharger operates. The sub-assembly will be part of the cooling system.
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