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How Bentley’s 4.0L Twin Turbo V8 Shuts Down Cylinders

The new Flying Spur V8 builds has a 60-year tradition of using cross-plane V8 engines. The V8-powered Flying Spur has a wonderful engine note, better fuel consumption and fewer CO2 emissions – while still having rocket-like performance.

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The Bentley 4.0-litre V8 engine has a high strength aluminium block, and twin-scroll turbochargers and primary catalytic convertors nesteled in the V of the engine.

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The compact V has a five bearing crankshaft, and a crankshaft which directly drives the water pump and timing chains via an intermediate shaft.

An exactly square engine matches the stroke length to the 86 mm cylinder bore. This gives the engine over 135 bhp per litre, and a top speed of 198 mph (318 km/h).

The V8 puts out 404 kW/ 770 Nm of face-melting power, and a 0-60 mph time of 4.0 secs (0-100 kph, 4.1 secs).

To lower fuel usage even further, the V8 engine can shut down four of its eight cylinders when torque demand is below 250 Nm and engine speed is below 3500 rpm. The driver won’t notice this,  with deactivation times of around 20 milliseconds (a tenth of the time it takes to blink).

The engine uses a two-stage sliding cam system which switches off cylinders two, three, five and eight as necessary via the intake and exhaust valves. The result is a fuel savings of around 30 per cent depending how heavy a foot the driver has. But the temptation will always be to open it up, full bore.

The new Flying Spur V8 is deliver driver-focused, whilst offering passengers the refinement, comfort and technology expected from a grand limousine.

The Flying Spur range is elegant, powerful, and aggressive, while keeping that air of elegant classic Bentley design, best-in-class execution, and authentic materials. The new Flying Spur V8 has contemporary engine technology and the latest driver assistance and infotainment systems for enhanced safety, security and relaxation on every journey.

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