BMW EfficientDynamics in the BMW M4 Coupé.

As in other areas, the BMW M4 Coupé is a top performer when it comes to efficiency, too. Intelligent 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 Coupé. 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 M vehicles' specific aerodynamics concept. On the racetrack, large air inlets ensure perfect cooling of the engine, charge air, oil and brakes, as well as cooling of the transmission oil in the M DCT. 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, minimising turbulence and reducing air resistance. The gurney flap, a spoiler on the rear edge of the tailgate, further optimises the aerodynamic balance between the front and rear axle, cutting down on lift. As a whole, the precise coordination of these elements works to create aerodynamic balance, making the cars racetrack-ready with 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.


Optimum, perfectly-timed gear changes can help save fuel, particularly in urban traffic and over long distances. Change gears at the right time, use less fuel – the engine’s electronics system identifies the most efficient gear, based on road conditions and engine speed. An arrow lights up in the Info Display to show when it would be more efficient to shift into a higher or lower gear. The system also recognises quick acceleration and will delay its recommendation accordingly until the engine speed is up. BMW internal comparative tests have shown that vehicles with the Optimum Shift Indicator use around four per cent less fuel.


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 presses down on the clutch (manual transmission) or takes their foot off the brake (M DCT Drivelogic), the engine automatically starts up again in a fraction of a second.