BMW EfficientDynamics in the BMW 4 Series Gran Coupé.

The sportiness of the BMW 4 Series Gran Coupé is accompanied by outstanding efficiency. This is a result of BMW EfficientDynamics, a comprehensive package of measures and technologies that increase dynamics while, at the same time, reducing emissions. Whilst the aerodynamic bodywork adds to the sporty styling of the car, it also improves both performance and fuel efficiency.

Energy management.

The BMW 4 Series Gran Coupé contains a number of BMW EfficientDynamics technologies as standard, including Auto Start-Stop, Brake Energy Regeneration and Electric Power Steering. These technologies work together to guarantee intelligent energy management and sustainable driving.
  • Auto Start-Stop makes sure that fuel is only used when the car is actually driving. When the vehicle comes to a temporary standstill, for example at traffic lights or in stop-and-go traffic, the Auto Start-Stop saves fuel by switching off the engine as soon as the car is idling and the foot is off the clutch (with manual transmission), or when the car brakes to a complete standstill (with automatic transmission).
    A signal in the Information Display indicates that Auto Stop-Start is active. As soon as the clutch is pressed (manual transmission) or the foot taken from the brake (automatic transmission), the engine turns itself back on automatically.
    Auto Start-Stop function never compromises driving comfort and safety, as it remains inactive if the engine has not reached its ideal running temperature, the interior has not yet been sufficiently heated/cooled, if the battery level is too low or if the steering wheel is being turned. A central control unit restarts the engine if required, even when the car is at a standstill. This is especially useful if the car starts to roll forward or if the windscreen becomes foggy. Auto Start-Stop can be switched off at any time with the push of a button.
  • Every time you brake, kinetic energy is generated, and until recently, this energy has gone 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 their 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 permanently, which reduces the strain on the generator. The result is reduced fuel consumption and increased performance, a testament to the BMW EfficientDynamics philosophy.
  • Optimal, perfectly-timed gear changes can help save fuel, particularly in urban environments and over long distances. The engine’s electronics system identifies the most efficient gear based on the driving situation 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 when the car is accelerating quickly and will delay its recommendation accordingly until the engine speed has increased. Comparative tests have shown that vehicles with the Optimum Shift Indicator use around four percent less fuel.
  • Every time the driver steers, energy is consumed which is why BMW Electric Power Steering is only active when it is needed. Unlike conventional hydraulic steering systems, BMW EPS only uses energy when the wheel is actively being turned. When the steering wheel is static – e.g. when driving straight ahead along a motorway at high speed – the electric motor is inactive.


The entire vehicle design is a testament to the BMW EfficientDynamics philosophy. The optimised, aerodynamic front apron and undercarriage feature innovative improvements that reduce air resistance and fuel consumption.
The front apron is a prominent design feature that embodies the BMW EfficientDynamics philosophy. The integrated Air Curtain channels air through two vertical air inlets and along the front wheel arches. The accelerated air flow creates a kind of “curtain” on the outer side of the wheels. Then there is the Air Breather, which channels the air flow at the front wheels. These innovative technologies reduce turbulence and air resistance, which in turn reduces fuel consumption.
The flat undercarriage cover, which also shields the engine compartment, is an additional detail that greatly improves the car’s aerodynamics. These new trim elements are not only highly advantageous in terms of aerodynamics: they also improve sound insulation and provide greater protection from rust.
  • The Air Breather is located behind both front wheel arches and is one of the innovative features used to optimise the vehicle's aerodynamics. Together with the Air Curtain in the front apron, the Air Breather greatly reduces turbulence and accurately channels the air flow. This decreases air resistance, thereby reducing the vehicle’s fuel consumption and CO2 emissions.

ECO PRO mode.

The ECO PRO mode helps drivers reduce their fuel consumption by up to 20 percent, depending on their driving style.
ECO PRO Route shows the most efficient route based on the traffic situation, driving style and road conditions. The on-board computer displays the percentage of fuel that can be saved by driving along the route selected by ECO PRO Route.

BMW TwinPower Turbo technology.

In petrol engines, BMW TwinPower Turbo technology combines a TwinScroll turbocharger with Valvetronic, including Double-VANOS and High Precision Injection. In the diesel engines, specially optimised turbocharger technologies are combined with the latest generation CommonRail direct injection and variable turbine geometry. BMW TwinPower Turbo significantly reduces the fuel consumption of BMW petrol and diesel engines – while at the same time boosting power output across a wide range of engine speeds.