Standard power in europe is about 265hp, in US it is 250hp. Remapped power you're looking at 320hp/370ftlbs. As for Gas Mileage, my MPG display right now reads 18.3 (but it is remapped). I get amazing mileage on the highway though. When buying an S4 first thing you should look for is turbos that are going. If you test drive it keep a sharp ear for any drill noises. A blown turbo sounds like a dentists drill. Also S4's are known for the syncros in 1st and 2nd gear to fail prematurely. Try and get a good feel for those gears. Also see if the car was properly serviced, prolonged oil changes can also have an effect on the turbos. Also try and find out the driving habbits of the previous owner, if he let the car idle to cool the turbos and if he let them warm up as well.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.