They will fit perfectly. Outside diameter is a bit larger so your speedometer will show 4% lower speed than now, but that could actually be closer to the real speed. You will have a bit less gap between tires and fenders and that looks better. If the rims are not scratched and tires really have only that much on, it is a real bargain. Go for it before it is too late.
Edit: You will need hubcentric rings because the centerbore on a newer models is larger than on your A8. They are cheap and easy to find.
Last edited by mishar; 08-08-2014 at 10:11 AM.