Whats got a V10 with a 7 speed SMG and has 507hps? A Super GT500 racing car? Wrong! Its the BMW M5. We gathered the best from around the world to see which car is up to par with this speed machine from BMW. The Nismo R34 GT-R Z Tune, 911 Carrera S, Lambo Gallardo and M3 CSL go up against the M5 at Tsukuba