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:
The concept
The active steering actively varies the steering
angle of the front wheels in relation to the steering
wheel movements. In addition, it also varies
the steering force required for steering depen ...
The concept
The concept
Two radar sensors below the rear bumper monitor
the area behind and next to the vehicle at
speeds above approx. 30 mph/50 km/h.
The system indicates whether there are vehicles
...
Removing
Only remove the head restraint if no one will be
sitting in the seat in question.
1. Pull the head restraint upward as far as possible.
2. Press the button, arrow 1, and pull the head
restrain ...