Most of us aren’t racing in the snow, but I understand Audi has been in the performance AWD business a lot longer and should have the edge. M5 is a lot faster than the RS6 and RS7 — 5+ mph in the quarter mile is no joke. M5 will drive right on by the Audi. But if all you do is 0-60, then it is just a few tenths and whoever gets the jump probably wins.
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