Under the Hood

The 640i is powered by a 315-horsepower, turbocharged 3.0-liter six-cylinder engine. Its peak torque rating is 332 pounds-feet. BMW cites a zero to 60 mph time of 5.5 seconds for both the coupe and convertible. The standard eight-speed automatic transmission includes steering-wheel-mounted shift paddles.

Other standard features include computer-controlled adaptive shock absorbers and Driving Dynamics Control, which allows the driver to adjust the ride quality, accelerator response, power-steering assist level and automatic transmission behavior.

Optional mechanical upgrades include active stabilizer bars and active steering, the latter of which adds rear-wheel steering to the earlier generation's variable-ratio front steering system.

    See also:

    Emergency Request
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    Pinch protection system
    If the closing force exceeds a specific value as a window closes, the closing action is interrupted. The window reopens slightly. Danger of pinching even with pinch protection Even with the pin ...

    Maintenance and repairs
    Advanced technology, e.g., the use of modern materials and high-performance electronics, requires suitable maintenance and repair methods. Therefore, have this work performed only by a BMW cent ...