The S series belong to a cadre of Sports oriented performance cars by connecting some engine boosting technologies to the normal engine of the A versions. The all new 2013 Audi S4 Sedan and the S5 Sportback are few of the very ideal models in the Audi fleet. Both have their own pros and cons. The S4 is a compact sedan car that is ideal in performance along with a reasonable price tag whereas the S5 Sportback belongs to a sports form coupe tuned to meet practical needs. It costs a bit high but gives a well proportioned performance as the car is a mid-engine car which has its own effect on performance. The Audi S4 saloon is a compact executive car which has a heart of a performance car. It is powered by a 3.0 liter turbocharged V6 TFSI engine which generates the maximum power More >