Next to the RS4 the Audi S4 is the most sporty version of the A4. Albeit only since 1994, even though the S4 had already been available a few years. Between 1991 and 1994 it was the sports version of the Audi 100 C4, because the A4 did not exist at the time. The current S4 is available as a limousine and as an estate -together with four Audi S4 tyres that transfer the power of the 330 bhp engine to the road. The tyres for the S4 must be high-performance and you can order them in various sizes from mytyres.co.uk.