Seen on numerous occasions undergoing final testing at Germany’s Nürburgring, often with a BMW M5 following, the 2008 Audi RS6 is rumored to feature the same 5.2L V10 from the S6 but with a turbocharger bolted on for extra kick. Early estimates put its output in the vicinity of 520-550b horsepower, enough to give it a significant power advantage over its rivals.





