BMW Z4: lightweight concept

Beautifully balanced.

The lightweight concept for the BMW Z4 Roadster.

Less weight means more efficiency. That's why the BMW Z4 Roadster uses lightweight components for its construction. Magnesium for the engine, and aluminium for the chassis, wheels and brakes. The two-part hardtop, made of aluminium shells, reduces overall weight by seven kilograms compared with traditional steel constructions. The reduced unsprung weight and a low centre of gravity add the final touches to ensure perfect balance and pure driving pleasure at all times.