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:

    The concept
    Top View assists you when parking and maneuvering. To accomplish this, the door region and road surface region are shown on the Control Display. ...

    Releasing
    Raise lever slightly, press the button and guide the lever down. ...

    Text messages
    Text messages at the upper edge of the Control Display explain the meaning of the displayed indicator and warning lamps. ...