Impressive as the 572HP and 479lb.ft of torque produced by the Audi RS6's twin-turbocharged V10 engine may sound, there's always room for improvement. APS, the UK importer of the Swiss tuning brand Sportec, has launched two upgrade packages for the sedan and station-wagon (Avant) variants of the RS6.
The first stage adds a remapped ECU boosting output to 650-horsepower at 6,300 rpm, coupled to 540lb.ft (740Nm) of torque between 2500-4,000 rpm. With this kit, the APS Sportec-prepped RS6 reaches 62mph (100km/h) in 4.4 seconds, while top speed is limited to 190mph or 305 km/h.