BMW M subbrand


BMW Efficient Dynamics in the BMW M4 Convertible.

As in other areas, the BMW M4 Convertible is a top performer when it comes to efficiency, too. BMW EfficientLightweight construction and BMW EfficientDynamics measures such as the Automatic Start/Stop function or Brake Energy Regeneration ensure optimal use of resources and thus play a crucial role in maintaining the power and stamina of the BMW M4 Convertible. This results in not only better dynamics, but also a reduction in fuel consumption and emissions.

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Comprehensive coordinated aerodynamic elements optimise driving dynamics, stability and control in M vehicles, especially at high speeds.
The striking front apron visually embodies the specific aerodynamics concept of the M car. On the race course, large air inlets cool off the engine, charge air, oil, brakes and the transmission oil in the M dual-clutch transmission. The two vertical inlets in the Air Curtain and the side M gills with integrated Air Breather behind the wheel arches create an accelerated flow of air around the front wheels. This buffer of air encloses the wheel arches aerodynamically, minimizing turbulence and reducing air resistance.
As a whole, the precise coordination of these elements works to create aerodynamic balance, giving the cars that unmistakeable M-feel.


Every time the brakes are hit, kinetic energy is generated and until recently this energy went unused. Brake Energy Regeneration takes advantage of this long-overlooked potential. It harnesses the coasting energy that is generated whenever the driver brakes or takes his or her foot off the accelerator and turns it into electricity. This electricity is then used to charge the car battery. The intelligent energy management system means that the alternator no longer needs to run constantly, which reduces the strain on the generator. The result: reduced fuel consumption and increased performance – classic BMW EfficientDynamics.


The Automatic Start/Stop function switches the engine off when the vehicle comes to a temporary standstill (e.g. at traffic lights or in a traffic jam) to further reduce overall fuel consumption. When the driver takes their foot off the brake (M DCT Drivelogic), the engine automatically starts up again in a fraction of a second.