The RS4 was introduced in January 2005, two years before M3.It's not a fair race because the guys at BMW not only known everything about Audi but they had two years to analyse their opponent, it's very easy to build a (probably)better car in this case.They did the same with the RS6, 3 years after it's intorduction, they came with the M5 and how astonishing that it was faster...