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:
Engine oil temperature
Engine oil temperature
▷ Cold engine: the pointer is at the low temperature
end. Drive at moderate engine and
vehicle speeds.
▷ Normal operating temperature: the pointer
is in th ...
Safety
BMW's inflatable tubular Head Protection System includes side curtain-type
airbags for the first and second rows. Front-seat side-impact airbags are
installed, and rear side-impact airbags are opt ...
Actions in the event of a flat tire
Normal tires
1. Identify the damaged tire.
Do this by checking the air pressure in all
four tires.
If the tire inflation pressure in all four tires is
correct, the Flat Tire Monitor may not hav ...
