Although its a far cry from the "lightweight" (for BMW) vehicles listed above, what about the 07/08 Alpina b7s? I thought they we running about the same 1/4 mile (12.8), and a 180 mph+ top speed to boot.
I assume that you excluded 2013 models because of the new variants being released? I think there are several heading down the pipeline which should greatly exceed the pre-2012 numbers, but such is the nature of the game.
Ps, I don't see why the z8 shouldn't count. It is, after all, a very fast "stock non-m" released before 2012 per OP (albeit a pricey one).
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