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:

    Antilock Brake System ABS
    ABS prevents locking of the wheels during braking. The vehicle remains steerable even during full brake applications, thus increasing active safety. ABS is operational every time you start the ...

    Front
    A storage compartment is located in the center armrest between the front seats. Opening Raise the center arm rest. Repositioning Center armrest can be pushed in the longitudinal direction. I ...

    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 ...