The 2007 Audi RS 4 and 2007 BMW M5 are practical four-door sedans, yet they are also dedicated high-performance machines. They are sports cars disguised as everyday transportation.
This is a cool video from Inside Line, but I find the comparison to be way out of balance. For one, an M5 has a V10 500 hp and is more of a family car(which just goes really fast). I think the RS4 should be actually compared to the BMW M3, but also, on the other hand, the RS6 could be compared to the BMW M5.
Regardless, this is a really cool video and I'm sure you will enjoy it. I really like the Audi RS4, but I would obviously take the M5 with a V10 over it any day.
Article By CARversation.com