First Look: BMW 640d xDrive Coupe

By Christian Stampfer on 17 June 2012
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In March 2011, the BMW Group introduced the third generation of the BMW 6 Series.  The 6 Series Coupe and Convertible are playing a key role in the strategy of the Bavarian automaker in the top-class luxury segment. With an elegant and sportive design language, BMW is trying to continue and to expand the success of its upper model range.

The BMW 640d Coupe and Convertible were unveiled to the public in September 2011 at the Frankfurt International Automobile Ausstellung (International Automobile Show). With the announcement of the BMW 640d xDrive Coupe and Convertible in February 2012, the model range of the 6 series saw a further expansion with a six-cylinder in-line diesel engine combined with the xDrive all-wheel drive system. The 640d is following the footsteps of its predecessor, the previous-generation BMW 635d, which became the first diesel-powered model in this segment in 2007.

The multi-stage turbocharged six-cylinder diesel develops a maximum power output of 313 hp (230 kW). It features the latest generation of common-rail direct fuel injection, whose piezo injectors work with a pressure of 2,000 bar.  BMW’s TwinPower Turbo technology offers immediate power distribution at any time. While driving at low revs, only the smaller one of the two turbochargers is operating. When the driver asks for more power, the system activates the larger one and the engine develops torque of 630 Nm (464 pound-feet). The design of BMW’s TwinPower Turbo technology  means that power is available across a wide range of RPM, starting at 1,500 and going up to a maximum output at 4,400 rpm.

Next to the engine, the new ZF eight-speed sports automatic transmission and BMWs xDrive are playing a key role in bringing the power of the engine onto the road. The latest generation of BMWs all-wheel drive system features performance control, which under electronic control divides power between the right- and the left-hand rear wheels to ensure an even sportier driving experience. Using a constant analysis of the current driving situation, power is quickly distributed to where it is needed. When the system detects understeer, a greater proportion of drive power is immediately sent to the rear wheels.  In normal driving situations, 60% of the power is sent to rear axle while 40% is directed to the front, thereby maintaining the rear-wheel characteristics of a BMW.

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