BMW i8 Rear


More speed. Less weight.
More agility. Less drag.

BMW EfficientLightweight showcases the ultimate in efficient, dynamic driving. Thanks to the use of especially lightweight and sturdy materials − such as carbon in the passenger cell, aluminium in the chassis, high strength steel in the body and ultra modern magnesium alloys in the engine − fuel consumption is reduced, while driving performance and dynamics are improved.

Carbon – a new era begins.

Active air stream kidney grille

The benefits.

Carbon fibre reinforced plastic (CFRP) is a highly resilient composite made of carbon fibres and a matrix of plastic. It is approximately 30% lighter than aluminium and 50% lighter than steel.

Air curtain

Step 1.

In collaboration with SGL Automotive Carbon Fibers, BMW Group produces the carbon fibres itself. With over ten years of research and development, it is now possible to deploy the material in large-scale automobile construction.

Air breather

Step 2.

The spun fibres are woven into mats and soaked in special resins.

Active rear spoiler

Step 3.

They are then baked to form rigid elements – the body components.

Air blade

Step 4.

A specially developed, fully automated adhesive procedure then cements the body components together.

Aero wheel rims

The result.

Using carbon creates a highly stable body and greater safety for the driver and passengers. Maximum strength permits faster acceleration as well as improved agility and roadholding, while the lower weight reduces fuel consumption.

BMW Chassis BMW Chassis

The carbon passenger cell.

Thanks to its strength, the carbon material found in the passenger cells provides exceptional protection in accidents, yet is still light enough to balance out the additional weight of the High Voltage (HV) battery. The result is greater safety combined with a generous and comfortable level of spaciousness, which simultaneously saves weight and further increases dynamics.

BMW 5 Series Saloon

Top aerodynamic performance.

Thanks to targeted aerodynamic measures, your BMW is able to achieve an optimised drag coefficient. This has a positive effect on efficiency and driving stability while also reducing the noise level in the cabin.

Active air stream kidney grille

Active air stream kidney grille.

The active air stream kidney grille knows when the engine, brakes and other components need air and automatically opens the air vents. If no further air intake is required, it closes them again. This improves aerodynamics, and fuel consumption falls.

Air curtain

Air curtain.

While you control your vehicle, the air curtain controls the airstream by reducing the air resistance of the body. Its narrowing channels speed up the airstream and guide it past the wheels. This reduces the air turbulence in the wheel housings, decreases the drag and reduces fuel consumption and CO2 emissions.

Air breather

Air breather.

You accelerate. You’re moving faster and faster. But you still cannot detect any air resistance. This is because the air breather channels the air on the front wheels. It reduces turbulence on the wheel housings and breaks down the air swirls. Fuel consumption and CO2 emissions are decreased.

Active rear spoiler

Active rear spoiler.

As speed increases, there is a rise in the forces acting on the body of the vehicle. At 68mph, the active rear spoiler extends automatically. Drag is reduced, roadholding is optimised and lift on the rear axles is decreased, thus reducing fuel consumption and COemissions. At 43mph, the rear spoiler retracts.

Air blade

Air blade.

The air blade is a sharp-edged extension of the C-pillar that separates the air flow and thus reduces the wake behind the vehicle. This lowers the aerodynamic drag at the rear, which in turn reduces both fuel consumption and CO2 emissions.

Aero wheel rims

Aero wheel rims.

An easy match against the wind: flow-optimised aero wheel rims in turbine styling guide the airflow optimally along the sides of the vehicle and thus enhances its aerodynamics.