Following their usual pattern, BMW initially introduces the standard version of a vehicle, and then some time later brings out a high-performance M version. It may seem a long time in coming for the Z4, but these recent photos, taken at Germany's famous racetrack Nürburgring, show that BMW is currently testing the M version of the Z4. The final product will most likely be launched at this fall's Frankfurt Motor Show.
The new sports car may use either a 350-hp V-8 engine or the 343-hp in-line six from the current M3.
The Z4 M can be distinguished from the standard model by its big front skirt with large air intakes and by the four exhaust pipes at the rear. This prototype also is equipped with a removable hardtop and very low-profile performance tires.
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