Tyre Size: --- 16 Inch ---, Profile: 50, Width: 225/50 | Porsche 928 S4 1987 to 1991

Originally fitted with a 225/50ZR16 radial front tyre, and a 245/45ZR16 rear.

The S4 was the most dramatic update to the 928. It brought the car into the late 80s very effectively, with a new, larger, 32-valve version of the V8 engine, sophisticated management, and a new automatic gearbox. These changes were reflected by a comprehensive update of the styling, improving the aerodynamics, as well as smoothing the looks. It no longer looked like a 70s car.