What is the difference between RS4 and S4?
What is the difference between RS4 and S4? no difference other than the computer. as for the s4 v rs4, the cam is different, the pistions are lighter and make a higher compression, higher flow intake mani/heads, different fueling, better exhaust, etc. What is the rarest color B5 S4? I really only know about the B5 S4 but I would say the rarest colors for that car are Hibiscus Red, Cactus Green, Pearl White and Casa White. Then the more common colors would be black, silver, nogaro, santorin, red, and yellow with Silver being the most common. The S4 never...