The Z4 is the successor of the Z1 and the Z3. Compared to them, its size increased, and its appearance changed. Supposedly, the new designer Chris Bangle, already modelled the Z3, but the Z4 really displays his style. Countercurvatures in the sides provide relatively sharp edges and a striking optics for a roadster.
If you are interested in the bodyshell of the Z4, click here. 08\06