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:

    General information
    Your vehicle contains advanced technology for the reduction of fuel consumption and emissions. Fuel consumption depends on a number of different factors. The implementation of certain measures, ...

    Speed limit
    Entry of a speed limit which, when reached, should cause a Check Control message to be issued. Renewed warning if the vehicle speed drops below the set speed limit once by at least 3 mph/ 5 k ...

    Activating HDC
    Press the button; the LED above the button lights up. ...