The Audi S4 is the high performance variant of Audi’s compact executive car A4. A more powerful internal combustion engine, larger upgraded brakes, firmer suspension, larger roadwheels, and distinctive sheetmetal, styling clues and badging have always been amongst the many upgrades the S4 receives over its mainstream 100 and A4 siblings. At the heart of the B8 S4 powertrain is an all-new, all aluminium-alloy 3.0 litre TFSI supercharged V6 engine and like the rest of the B8 model range, now with Fuel Stratified Injection (FSI). This petrol engine displaces 2,998 cubic centimetres (182.9 cu in), and it produces a power output of 245 kilowatts (333 PS; 329 bhp) from 5,500 to 7,000 revolutions per minute (rpm). Torque is rated at 440 newton metres (325 ft·lbf) from 2,900 to 5,300 rpm. This high power output is achieved by utilising forced induction – and specifically, an all-new Eaton ‘Twin Vortices Series’ (TVS) Roots-type positive displacement compressor. This new supercharger features twin four-lobe rotors, which are axially-twisted 160 degrees. Acceleration from standstill to 100 kilometres per hour (62.1 mph) takes 5.1 seconds[19] for the saloon with manual gearbox. The same dash to 100 km/h in the saloon with S tronic takes 5.3 seconds, and the Avant at 5.4 seconds. The top speed is electronically limited to 250 kilometres per hour (155.3 mph). With figures like these, the B8 S4 accelerates more quickly than its V8-engined predecessors.
