The fourth generation of the BMW M3 was announced at the 2007 Geneva Motor Show as the BMW M3 concept, the M3 Concept had almost no differences from the production version in terms of design, that had its world premiere on the 2007 Frankfurt Motor Show.
Similar to its predecessors that introduced a new engine, the fourth generation of the M3 did the same and marked the debut of the BMW S65 V8 engine. The engine generates a maximum power output of 414 hp at 8,300 rpm,with a peak torque of 400 N⋅m at 3,900 rpm.A 6-speed manual transmission was included as standard. As of April 2008, BMW offered a new 7-speed Getrag double-clutch paddle shift transmission, called M-DKG (Doppel-Kupplungs-Getriebe) or M-DCT (Double Clutch Transmission) as an option, which reduces shift pauses to less than a tenth of a second and shortens the car’s 0–62 mph acceleration time by 0.2 seconds vs. the car equipped with a manual transmission. It features both automatic and manual modes similar to the SMG gearboxes in the E36 and E46, but with more speed and efficiency.
The E92 M3 coupé inherited a carbon-fibre roof similar to the one used on the E46 CSL. For 2011, the E92 M3 received a model refresh commonly referred to as a LCI by BMW. Those changes included minor interior trim pieces and LED rear tail-lights. Testing by Car and Driver magazine has shown that the 2011 M3 equipped with an M-DCT transmission accelerated from 0–60 mph in 3.9 seconds and went on to record a 12.4-second quarter-mile time.This is almost half a second quicker than 2008–2010 M3 models with the same engine and transmission.
The M3 was again available as a 4-door saloon, based on the E90 3 Series saloon, but unlike the regular saloons the M3 version shares the coupe’s wide and sculpted front end, including the headlights. Saloons, however, do not have the coupe’s carbon-fibre roof, and are 10 kg heavier than the identically equipped coupé.
Although the front-end design of the saloon matches the specific look and high-performance character of the coupé, the side-sills and rear diffuser are tailored for the saloon. The M3 saloon is powered by the same engine as the other two versions coupé and convertible. In 2008, a four-door (E90), six-speed manual transmission M3 accelerated to 60 mph in 4.3 seconds in a Motor Trend test, matching the performance of the M3 Coupé.
The E93 convertible version joined the M3 lineup shortly after the E92’s launch, and is based directly on the M3 Coupé. The convertible uses a power retractable hardtop which adds 200 kg to the weight of the car, bringing the total to 1,810 kg with a negative impact on the convertible’s overall performance. The convertible features a special leather surface for the seats that reflects sunlight. This reduces the tendency of the seats to become uncomfortably hot with the top down
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