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:
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 available in a vehicle,
e ...
Check the tire inflation pressure
regularly
Check and, if necessary, correct the tire inflation
pressure, at least twice a
month and before starting on a long trip.
Low tire inflation pressure increases rolling resistance
and thus raises ...
Switching off automatically
The system switches off and the LED goes out:
After approx. 160 ft/50 m when driving forward.
Above approx. 22 mph/36 km/h when driving
forward.
Switch on the system again if necessary. ...