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:

    Removing: manual head restraints
    Only remove the head restraint if no one will be sitting in the seat in question. 1. Pull the head restraint upward as far as possible. 2. Press the button, arrow 1, and pull the head restrain ...

    Short commands of the voice activation system
    Vehicle equipment All standard, country-specific and optional equipment that is offered in the model series is described in this chapter. Therefore, equipment is also described that is not avai ...

    Environmental conditions
    Say the commands, numbers, and letters smoothly and with normal volume, emphasis, and speed. Always say commands in the language of the system. The language for the mobile phone voice ...