Audi claims that the ur-Quattro suffered only a ~100 Lb weight penalty due to the AWD system. I wouldn't think the 90Q would suffer a 400 Lb penalty due to the AWD. My guess that the 400 Lb number includes weight due to the superior independant rear suspension setup and other goodies added onto the Quattro model, and is not 100% due to the addition of the Quattro AWD. -glen