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:
Central locking system
The concept
The central locking system becomes active
when the driver's door is closed.
The system simultaneously engages and releases
the locks on the following:
Doors.
Trunk lid.
Fuel ...
Environmental conditions
▷ Say the commands, numbers, and letters
smoothly and with normal volume, emphasis,
and speed.
▷ Always say commands in the language of
the system. The language for the mobile
pho ...
Controls
1 Change entertainment sources
2 Change station/track
3 Programmable memory buttons
4 Volume, on/off
5 Change wave band ...