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.

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    Storing music
    General information Music tracks from CDs/DVDs and USB devices can be stored in the music collection on a hard disc in the vehicle and played from there. ▷ Audio CD: tracks are converted i ...

    Winter tires
    Do not drive with a tire tread depth of less than 0.16 in/4 mm. Below a tread depth of 0.16 in/4 mm, tires are less suitable for winter operation. ...

    Manual transmission
    Starting the engine 1. Depress the brake pedal. 2. Press on the clutch and shift to neutral. 3. Press the Start/Stop button. The ignition is activated automatically for a certain time and is sto ...