For the first time since its inception in 1984, the BMW M5 is arriving with turbochargers. The move might seem like heresy for a brand known for high-revving engines, but recall that M Division has already applied forced induction to the 1 Series M Coupe, X5 M, and X6 M. Switching to a smaller, more advanced powertrain means the new M5 can deliver 30-percent better fuel economy than its predecessor, while boasting 10 percent more power and 30 percent more torque.
The new, fifth-generation M5 finds motivation in the form of a twin-turbocharged, direct-injected 4.4-liter V-8. In American specification, the engine provides 555 hp from 6000 to 7000 rpm, with 500 lb-ft of torque delivered all the way from 1500 to 5750 rpm. It revs to 7200 rpm. The last M5 packed a 5.0-liter V-10, rated at 500 hp and 383 lb-ft, which provided a BMW-endorsed 0-to-60-mph time of 4.5 seconds. The 2012 M5 not only trumps those power ratings, but also rockets to the benchmarks a few ticks faster: BMW says the new car will reach 62 mph in 4.4 seconds, and 124 mph in just 13.0 seconds. In typical German fashion, maximum velocity is limited to 155 mph, but opting for the M Driver’s Pack increases the limit to 190 mph.
Power is transmitted to the rear wheels via a seven-speed dual-clutch transmission, known as M DCT in BMW parlance. It offers a variety of automatic shift programs, as well as fully manual gear changes effected by nudging the shift lever or pulling on the wheel-mounted paddles, plus a Launch Control mode. At the rear axle is BMW’s Active M Differential, which can vary the torque split between the rear wheels for maximum grip. It works in tandem with the stability control system to determine how much power should be sent to each wheel, it can shuffle anywhere from zero to 100 percent of engine torque to either of the rear tires. The trick diff is said to reduce understeer, provide better high-speed stability, and improve cornering performance. The suspension dampers and steering can each be switched between “Comfort,” “Sport,” and “Sport Plus” modes. Six-piston brake calipers grab large discs that measure 15.7 inches in diameter at the front and 15.6 inches rear. BMW says the new M5 sets new benchmarks for lateral grip and handling, and implies the car can be taken from road to track with only minimal preparation. The doors, hood, and front fenders are all made of aluminum, keeping curb weight to 4279 pounds.
