The 2009 BMW Z4 has been caught out testing ... give a pretty good indication of a retractable hardtop. Instead of the 3-Series' three-piece folding top, the Z4 will merely fold in two.

Not in the 1970s “that Celica looks a bit like a Mustang” sense, but in the sense that Toyota and BMW worked closely ... If the Supra were merely a hardtop Z4, it wouldn’t be the first.

The BMW Blog, which is fast becoming our main resource for news regarding the propellor brand, is reporting that the 2009 Z4 will be offered both as a soft-top convertible and a hard-top.