Bentley Continental Flying Spur - the world's fastest four door saloon

Braking is provided by huge ventilated disc brakes - the largest of any production passenger car on sale today. The front discs are 405mm in diameter and 36mm wide, and the rear discs 335mm in diameter and 22mm wide. These are retarded by aluminium single-sided callipers branded with cast aluminium 'Bentley' logos.

The braking system features a Bosch anti-lock system with Brake Assist and electronic pressure distribution. The Continental Flying Spur also has a unique electronic parking brake - after the driver has applied the brake it will automatically re-apply one and five minutes later. This prevents accidental slippage should the brake discs cool after use. The parking brake system can also be operated as an emergency brake. In this instance braking is applied to all four wheels and the car's electronic safety systems remain fully operational allowing the driver to steer as normal.

The Continental Flying Spur also offers enhanced occupant safety with the use of a tyre-pressure monitoring system that constantly measures the tyre pressures in all four wheels and instantly warns the driver should a significant reduction occur.

Powertrain

The heart of the Continental Flying Spur is its magnificent 6.0-litre, twin-turbocharged 12-cylinder engine which will propel the car to 60mph in 4.9 seconds and on to a top speed of 195mph. This awe-inspiring piece of engineering was created for both the coupe and four-door versions of the Continental and delivers phenomenal power (552bhp/411kW) as well as that legendary wave of torque (479lb ft/650Nm) from low revs that is the hallmark of every Bentley.

"When the decision was taken to produce the Continental family, we knew we would need an engine that was incredibly compact and well packaged to incorporate both its styling requirements and complex powertrain," reveals Dr Ulrich Eichhorn, member of the board, engineering. "From the outset the W12 concept was created with all the group's top products in mind. That is why we had significant input into the basic architecture of the engine. This basis was then developed extensively by Bentley to meet our exacting requirements - high torque at low revs and effortless acceleration."

Brian Gush, chassis, powertrain and motorsport director, explains the unique development process: "The engine block is made from a hypereutectic aluminium alloy with silicon concentrates that reduce friction in the cylinder bores. Aluminium pistons were also specially developed to cope with the increase forces created by the turbochargers, which were themselves created exclusively for this Bentley engine."

The 12-cylinder block has a 48-valve head with four camshafts that operate using continually variable valve-timing. Power is transmitted via a seven-bearing crankshaft to the car's six-speed automatic transmission. To ensure that the large powerplant met stringent Euro IV and US LEV emissions regulations the twin turbochargers were designed with a unique bypass valve that automatically sends exhaust gases to heat the catalytic convertors when the car is started from cold. This valve then operates as the turbocharger wastegate at all other times.

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