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:

    Components of the integrated Owner'sManual
    The integrated Owner's Manual consists of three parts, which offer various levels of information or access possibilities. Quick Reference Guide Located in the Quick Reference is important inform ...

    Climate control functions in detail
    Temperature Turn the wheel to set the desired temperature. The automatic climate control reaches this temperature as quickly as possible, if necessary by increasing the cooling or heating ou ...

    Seats
    Note before adjusting Never attempt to adjust your seat while the vehicle is moving. The seat could respond with unexpected movement, and the ensuing loss of vehicle control could lead to an accid ...