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:
Adjusting
General information
Do not adjust the seat while driving
Never attempt to adjust the driver's seat
while driving.
The seat could respond with unexpected movement
and the ensuing loss of vehicl ...
Rear head restraints
Correctly adjusted head restraint
A correctly adjusted head restraint reduces the
risk of injury to cervical vertebrae in the event of
an accident.
Adjusting the head restraint
Correctly adjust ...
Tire damage
General information
Inspect your tires often for damage, foreign objects
lodged in the tread, and tread wear.
Notes
Indications of tire damage or other vehicle defects:
Unusual vibrations dur ...