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:
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 ...
Calling up the stored desired speed and distance
While driving
Press button 4, All of the displays
in the instrument panel lights
While standing
Before leaving the vehicle
Before leaving the vehicle with the engine
running, engage po ...
DTC Dynamic TractionControl
The concept
The DTC system is a version of the DSC in which
forward momentum is optimized.
The system ensures maximum forward momentum
on special road conditions, e.g., unplowed
snowy roads, bu ...