The BMW Z4 M Coupé (E86) is the high performance version of the first generation BMW Z4, codenamed E85.
The coupé model was introduced to the public first in concept form at the 2005 Frankfurt Motor Show and then in production form at the 2006 Geneva International Motor Show with production starting shortly after.
The Z4 M Coupé had a fastback coupé design, resulting in a different body shape to its Z3 M Coupe predecessor. The Z4 M Coupé also did away with the controversial iDrive system. The roof added an additional weight of 5 kg (11 lb) as compared to the roadster.
The official 0–97 km/h (0–60 mph) acceleration time is 5 seconds and the top speed is electronically limited to 249 km/h (155 mph). The Z4 M Coupé set a laptime at Nurbürgring Nordschleife of 8 minutes and 15 seconds.
The M Coupe is powered by the BMW S54 straight-six engine from the E46 M3. The engine had fly-by-wire throttle and double VANOS (variable valve timing). In most countries, the engine produces 252 kW (338 bhp) at 7,900 rpm and 365 N⋅m (269 lb⋅ft) at 4,900 rpm- the same outputs as in the M3. The engine has a redline of 8,000 rpm. Cars sold in North America have 250 kW (330 bhp) at 7,900 rpm and 355 N⋅m (262 lb⋅ft) at 4,900 rpm.
The engine was mated to a new 6-speed "Type H" ZF manual transmission since the M3's original 6-speed transmission did not fit the Z4's chassis. The Z4 uses the same limited slip differential as the E46 M3.
Production began on 4 April 2006 and ended in 2008 when the E85/E86 Z4 was replaced by the E89 Z4. A total of 4,275 M Coupes were produced, and 5,070 M Roadsters. This included 1,815 M Coupes for North America and 3,042 M Roadsters for North America.
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