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:
Electronic displays
With the Professional navigation system
1 Selection list, such as for the radio
Navigation display
Speed limit detection
Computer
2 Transmission displays
3 Service requirements
Messages ...
Telephone
...
Interior rearview mirror
Reducing the blinding effect
Reducing the blinding effect
From behind when driving at night: turn the
knob. ...