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:
Notes on Emergency Requests
Do not use the voice activation system to initiate
an Emergency Request. In stressful situations,
the voice and vocal pitch can change. This can
unnecessarily delay the establishment of a teleph ...
Speed limit
Display of a speed limit which, when reached,
should cause a warning to be issued.
Renewed warning if the vehicle speed drops below
the set speed limit once by at least 3 mph/
5 km/h.
Displayi ...
Comfort position
In the comfort position, the roof is not fully open.
This reduces wind noise in the passenger compartment.
Every time the glass sunroof is opened or closed
completely, it stops in the comfort p ...