The BMW M3 against the Audi S4. both have strong german racing heritage from DTM racing, rally racing and more, but which one is better? In this video we take a look at every generation of M3 from the E30 to the F80 and every S4 from the C4 to the B9. whether you like the sound of B5 S4 turbos or E36 ITBs, we will break down the best of these cars.