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:

    Avoiding unintentional alarms
    The tilt alarm sensor and interior motion sensor can be switched off together, such as in the following situations: ▷ In duplex garages. ▷ During transport on car-carrying trains, at ...

    Driving through water
    Maximum water depth: ▷ BMW X5: 20 inches/50 cm. ▷ BMW X6: 17 inches/45 cm. Adhere to water depth and speed limitations Only drive through water up to the above-mentioned depth at n ...

    Windshield washer nozzles
    The washer jets are automatically heated whenever the ignition is switched on. ...