See also:

Aerodynamic optimisation of underside panelling
As the excellent drag coefficient (cd = 0.26) would suggest, the aerodynamics of the new BMW 3-Series have been intensively honed in a state-of-the-art wind tunnel. The optimised aerodynamics also ...

Vehicle Overview
The X6, one of BMW's recent forays into SUV territory, is a tallish fastback that the company calls a sports activity coupe. With seating for four, it's basically a midsize SUV with four doors, ex ...

Remove attached parts following use
Remove auxiliary mirrors, roof or rear luggage racks which are no longer required following use. Attached parts on the vehicle impair the aerodynamics and increase the fuel consumption. ...