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:
Changing between panels
After a menu item is selected, e.g., "Radio", a
new panel is displayed. Panels can overlap.
► Move the controller to the left.
The current panel is closed and the previous
panel ...
Calling up the desired speed and distance
While driving
Press the button with the system
switched on.
In the following cases, the stored speed value is
deleted and cannot be called up again:
▷ When the system is switched off ...
HDC Hill Descent Control
The concept
HDC is a downhill driving assistant that automatically
controls vehicle speed on steep downhill
gradients. Without applying the brakes, the
vehicle moves at slightly more than walking
...