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:
TeleService Battery Guard
TeleService Battery Guard continually checks
the battery charge level of the vehicle. If the battery
charge level falls below a certain value, a
notification is automatically sent to your service
...
Twin-scroll turbocharging
The new four-cylinder engines also feature twin-scroll turbocharging. This
means that the exhaust stream from cylinders 1 and 4, and the exhaust stream
from cylinders 2 and 3, follow separate spir ...
TeleService
General information
TeleService supports communication with your
service center.
▷ Data on the vehicle's service requirements
can be sent directly to the service center. In
this way, the ...