The largest difference between production and racing car can be found under the bonnet: while the production version of the BMW Z4 is driven by a six-cylinder engine, the GT3 car is powered by a 4.0-litre eight-cylinder engine similar to the unit used in the BMW M3 GT2. This powerful heart produces over 480 bhp. Its excellent performance characteristics and good torque curve make the base engine from the production version of the BMW M3 predestined for use in motorsport.
The front axle of the BMW Z4 GT3 is a completely new design, based on a series concept. It is equipped with a tubular stabiliser bar with adjustable blades. The rear axle is designed as a longitudinal link axle, as with the series version of the BMW Z4. The steel body of the car comes from the BMW Plant in Regensburg. A safety cell made of extremely rigid, precision steel tubing is then welded into the body. The engine block of the V8 engine is produced in the BMW foundry in Landshut.
The BMW Plant in Dingolfing contributes the rear axle differential and drive shaft, among other things.During the development, BMW Motorsport engineers worked hand in hand in other areas with their colleagues from series production. This allowed them to access calculations from the field of computational fluid dynamics (CFD) when designing the car's aerodynamics. Furthermore, tests were also carried out in the wind tunnel and on the BMW Group's test benches.
Front and rear wings, bonnet, roof, fender and many other components are made of carbon fibre reinforced plastics (CFRP). Using this lightweight, torsion-resistant material contributed significantly to reducing the weight of the BMW Z4 GT3 to 1,200 kilograms.
