The BMW 1 Series M ("1M coupe") is a high-performance version of the BMW 1 Series Coupe, developed by BMW's motorsport branch BMW M. While BMW naming convention would have called the car the "M1", the name "BMW 1 Series M" was used instead, to avoid confusion with the original BMW M1.
The 1M Coupé uses a re-tuned version of the twin-turbocharged N54 engine which is used in various other models such as the 2011 BMW 335is coupe/covertible, 2011 BMW Z4 sDrive35is, and 2011 BMW 740i. In the 1M Coupe, the engine produces 340 hp (254 kW) at 5900 rpm and 332 lb·ft (450 N·m) torque from 1,500 to 4,500 rpm (with +369 lb·ft (500 N·m) overboost). The sole available drivetrain is a six-speed manual gearbox with a limited-slip differential.
The 1M coupe has a significantly wider track and bigger body than the standard E82 coupe, as well as a different body kit. Despite the car's larger size, it is 77 lb (35 kg) lighter than the standard E82 coupe, giving it a weight of 3,296 lb (1,495 kg).
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