Well, right now, not good at all since it is all still in boxes.

But, Callaway claimed 180-195 horsepower for a intercooled 320i turbo and 282 horsepower for a 323i intercooled turbo.  Also claimed a fraction under 7 seconds 0-60 for the 323i. Factoring in the difference in power and rearend ratios, I think around 7.5 would be a reasonable guess for a 320i.