Matt Farah of The Smoking Tire always has a habit of bringing us good stuff. Case in point, the great Audi comparison above. Audi has a stellar car in both the new 2010 S4 and the older, now defunct 2007 RS4. They both utilize Audi’s bulletproof all wheel drive system, however the S4 runs a supercharged 3.0-liter six cylinder whereas the RS4 has a nice lumpy V8. Matt, and buddy Craig put both cars through their paces in the canyons of Los Angeles County in California and in doing so gave us, in their opinions, the five best and five worst things about each car. It’s a great comparison by two guys that really know their stuff.