hi, I am sure they are not even comparable, but I have an S3, but I very seriously thinking of getting an '07 RS4. found one for very good value, but I even good value is still big money! Are they worth the money?? DOnt get me wrong, I love the quattro system on the S3, But I really wish it was more inclined to put power to the rear! Can anyone here let me know if this is the same system on the RS4? Also, is the tonnes of extra power gonna kill the fuel consumption completely? Is the fuel consumption very bad? anyone have real life figures?? Its lovely colour, brilliant spec! Thanks in advance for the help.