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:

    Long-term vehicle storage
    Your service center can advise you on what to consider when storing the vehicle for longer than three months. ...

    Traffic bulletins on the map
    General information "Traffic conditions/gray map" Active: indication on the control display is switched to shades of gray. This enables a better view of the traffic bulletins. Day/nig ...

    Rear seat heating
    Rear seat heating Switching on Press the button once for each temperature level. The maximum temperature is reached when three LEDs are lit. If the drive is continued within approx. 15 mi ...