A year removed from an update, the small 2 Series coupe strikes back with the 523-horsepower M2 CS, which is the most potent rear-wheel-drive BMW you can buy. At the risk of upsetting purists, however, no manual transmission is available this time. BMW announces a 0-100 km/h acceleration time of 3.8 seconds, aided by a weight reduction of 44 kg. Of course, production is limited. The other 2 Series models generate 255, 382 or 473 horsepower.