Wow, another rigged test:
http://www.einszweidrei.de/bmw/m3e462005-1.htm
This car is fully optioned with 19" wheels as can be seen on the spec list on the link. It ran 0-160 in 11.0 & 0-200 in 17.6
The one that ran 16.8 had 18" wheels & very few options & was tested in cooler conditions.
I guess its beyond the realms of possibility because you say so.