Best Motoring pits the Porsche Carrera S and BMW M3 CSL/M5 up against a Nissan Skyline Z-Tune and Lamborghini Gallardo. Who comes out on top? find out after the jump.

Best Motoring pits the Porsche Carrera S and BMW M3 CSL/M5 up against a Nissan Skyline Z-Tune and Lamborghini Gallardo. Who comes out on top? find out after the jump.