Video: Audi RS4 vs. BMW M3 CS

Perhaps one of the most popular match-ups among car enthusiasts is the Audi RS4 against the BMW M3. It's not exactly a fair comparison, because the Audi RS4 is a brand new car and the BMW M3 has been on the market for some time. What's more, the RS4 costs a lot more than the M3. Still, it's an obvious comparison and the U.K.'s Fifth Gear couldn't resist the idea. See the battle after the jump...