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:

    Displays in the instrument cluster
    1 Display of desired speed 2 Distance to vehicle ahead of you 3 Vehicle symbol 4 Brief status display Desired speed Marking in the speedometer The marking lights up in green: the syste ...

    General information
    Danger of burns from hot engine Do not open the cooling system while the engine is hot; otherwise, escaping coolant may cause burns.◀ Suitable additives Only use suitable additives; o ...

    Warning triangle
    The warning triangle is located in the container on the inside of the trunk lid. Unscrew the wing nut to open. ...