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
1. Turn the controller: select letters or numbers.
2. Select additional letters or numbers if
needed.
3. "OK": confirm the entry.
...
Automatic deactivation of the front passenger airbags
The occupation of the seat is detected by evaluating
the impression on the occupied seat surface
of the front passenger seat.
The front and side airbags on the front passenger
side are activate ...
Tire inflation pressure values over100 mph/160 km/h
X3 28i
X3 35i
...