BMW 6 Series Coupe
BMW 6 Series Coupe

Active Headrests first for BMW 6 Series BMW has announced the launch of a new engine to the BMW 6 Series range at the same time as the model line-up has been revised. The BMW 635d opens up a new sector of the market for BMW by mating the acclaimed twin-turbocharged diesel to the marque’s flagship Grand Tourer. The launch of the BMW 635d coincides with the introduction of fuel saving and emissions-cutting EfficientDynamics technology to the rest of the 6 Series range to improve performance. The model has also been given a subtle restyling to mark the technological changes.

With the world’s most powerful production six-cylinder diesel under the bonnet the BMW 635d Coupé and Convertible are unique in their segments. No other competitor can offer such frugal motoring in a Grand Tourer while still satisfying the demands of sophisticated buyers who insist on the best in performance and refinement.

Powered by a twin-turbocharged 2,993cc engine with an all aluminium crankcase and third generation common rail fuel injection system, the 635d comes with an output of 286hp and 580Nm of torque. These impressive performance figures have been made possible by the unique way the twin turbochargers work. A smaller turbocharger provides near instantaneous response for swift initial acceleration before a larger turbocharger comes in mid-range to provide additional thrust through to the redline. With peak torque available from just 1,750rpm a seamless wave of smooth acceleration is provided for the driver.

The result of this engineering excellence sees the BMW 635d Coupé record a zero to 62mph time of 6.3 seconds while the Convertible achieves this in 6.6 seconds. Both have top speeds electronically-limited to 155mph. However, the Coupé still achieves 40.9mpg on the combined cycle and a CO2 emissions figure of 183g/km, while the Convertible retains near identical figures recording 39.2mpg and 190g/km.

Aiding the BMW 635d’s performance is the introduction of EfficientDynamics technology. For the first time in the 6 Series, the range comes with Brake Energy Regeneration and the implementation of various needs-only operations of ancillary units. For example, the air-conditioning compressor can be decoupled from the drivetrain to prevent unnecessary drag on the engine and lower viscosity fluids are used in key components to reduce friction. An optimum gearshift indicator is fitted to advise on economical motoring, while active flaps located behind the kidney grille can close off to improve aerodynamic flow and reduce drag. These measures all add up to a BMW 635d that records lower fuel consumption and emissions figures than would previously have been possible.

continues... | Part Two

Published : 02/07/07 Author : Melanie Carter

BMW 6 Series News

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