BMW Z4 M Roadster

Manufacturer	BMW
Also called	Z3 M Roadster
Production	2006 - 2008
Predecessor	Z3 E36/7 M Roadster
Class	Roadster
Body style	2-door convertible
Layout	FR layout
Platform	E85
Engine	3.2 L S54 inline-6
Related	BMW Z4
Designer(s)	Anders Warming

BMW introduced the M version of the E85 Z4 in late 2006. Called the M Roadster, is powered by the same 3.2L, 8,000 rpm, S54 inline-6 ​​engine as the E46 series M3, which delivers 330hp with a new 6-speed manual transmission. Engine management with Siemens MS S70 with higher processing power (64 million calculations per second) than the MS S54 (25 million CPS) in M3. Include other functional components borrowed from the M3 CSL of compound (aluminum hubs, iron floating rotors) Brake and most parts of the suspension to M3. Among other changes the hydraulic steering setup that provides better feel than the electric system in standard Z4 models. Weighing of £ 3197 (1450 kg), the M Roadster has been tested by major U.S. car magazines to accelerate from zero-60 mph in 4.7 seconds, which is slightly faster than the Porsche Boxster and Porsche Cayman S S.. Leading electronic speed limited to 155 mph (249 km/h).

A new six-speed manual transmission is used for the original M3 six-speed does not fit Z4 chassis. The six-speed is the only transmission available in the M Coupe / Roadster; its final gear ratio is nearly the same as those of M3. It is widely reported in the forum owners that the 6-speed gearbox in the 2006 & 2007 M roadsters and coupes is prone to grinding when shifting from 1st to 2nd gear at high rpm. According to reports, had mixed response by BMW dealing with this issue, some owners of claimants received completely new gearboxes and others claiming their dealer calls the grinding " normal ".

The M Roadster MSRP is $ 52,100. A fixed roof version (M Coupe) is also available, though marginally heavier. Around Top Gear test track, the BMW set a time of 1:26.0 0.8 of a second faster than the Base Corvette C6 LS2.

Options include a premium package (cruise control, power memory seats, upgraded audio, BMW Assist system), heated seats, extended leather, navigation and body color aluminum hardtop.

Production Figures

Coupes: Worldwide: 4,275; North America: 1,815.
Roadsters: Worldwide: 5,070; North America: 3,042

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Last updated on 3 July 2013 at 13:17.