I decided to redesign the car as I was too plain and boring to be a portfolio piece and also it wouldn't help me reach the depth of hard surface modeling in Zbrush.
I also endend up using 3DS Max for some of the pieces. Zbrush is unmatching tool for subtractive modeling, but for more coherent pieces it is easier an faster in Max. But the ultimate difference is in the iteration capability, once you have done something in Zbrush it is rather hard to go back and make changes unlike in Max. One example for this is the brake wing above the front engine.
