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:

    Units of measure
    Setting the units of measure To set the units for fuel consumption, route/distance and temperature: 1. "Settings" 2. "Language/Units" 3. Select the desired menu item. ...

    Requirements
    Via the Control Display, set a language that is also supported by the voice activation system so that the spoken commands can be identified. Set the language ...

    Rain sensor
    The concept The time between wipes is controlled automatically and depends on the intensity of the rainfall. The sensor is located on the windshield, directly in front of the interior rearview m ...