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:

    Route
    Different views of the route are available during destination guidance: ▷ Arrow view. ▷ List of route sections. ▷ Map view. ▷ Arrow view in the Head-up Display ...

    Hands-free system
    General information Calls that are being made on the hands-free system can be continued on the mobile phone and vice versa. From the mobile phone to the handsfree system Calls that were begun ...

    Interior rearview mirror
    Reducing the blinding effect Reducing the blinding effect From behind when driving at night: turn the knob. ...