This is a version of the Z4 the end of 2006. Called the M Roadster, it's powered by the same 3.2L, 8000rpm, S54 inline-6 engine as the series M3-E46, 333hp issued by a manual gearbox and a new gearbox 6-speed manual transmission. Others will quickly borrowed parts of the M3 CSL (hubs aluminum, iron floating rotors), brakes and suspension of most components of M3. Other changes include a hydraulic steering, the installation program feel better, as the electrical system standard Z4 models. In the case of a weight of only 3197 kg (1450 kg), M Roadster has been tested by major American newspapers car to accelerate from zero-60 km / h in 4.7 seconds, which is a little faster than its main competitors, Mercedes-Benz SLK55 AMG and Porsche Boxster S. top speed is electronically limited to 155 kph (249 kph).
A new gearbox six-speed manual transmission, the M3 money supply since the original six-speed does not fit into the chassis-Z4. The six-speed transmission is only available in the M Coupe / roadster, whose translation of final reports are virtually the same as those of the M3. It is widely reported using forums owner, the 6-speed manual gearbox in 2006 and 2007 and the M Coupe Roadster is vulnerable to loops, if a relocation from 1 to 2 Passage high rpm. According to reports, there was mixed reaction BMW on the subject, some owners say they have received any new gearbox and other distributors say that their calls loops "normal".
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