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:

    AUX-IN port
    At a glance ▷ For connecting audio devices, e.g., MP3 player. The sound is output on the vehicle loudspeakers. ▷ Recommendation: use medium tone and volume settings on the audio de ...

    Automatic Service Request
    Data regarding the maintenance status or legally mandated inspections of the vehicle are automatically transmitted to your service center before a service due date. You can check when your serv ...

    Setting the voice dialog
    You can set whether the system should use the standard dialog or a shorter version. In the shorter variant of the voice dialog, the announcements from the system are issued in an abbreviated fo ...