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:

    Audio playback
    Selecting the track using the button Press the button repeatedly until the desired track is played. Selecting a track via iDrive Audio CDs Select the desired track to begin playback. CDs/D ...

    Navigation data
    Information on the navigation data 1. "Navigation" 2. "Options" Open. 3. "Navigation system version": information on the data version is displayed. Updating the nav ...

    Displaying stored Check Control messages
    1. "Vehicle Info" 2. "Vehicle status" 3. "Check Control" 4. Select the text message. Messages after trip completion Malfunctions indicated during a trip are display ...