BMW debuts its four door midsize flagship with the 2015 M3. The high performance four-door boasts a six-cylinder in-line engine with BMW's M TwinPower Turbo technology that helps deliver 425 hp and 406 lb-ft of torque. That kind of power will get you from 0-62 in 4.1 seconds or 3.9 seconds when supplied with the optional 7-speed double clutch transmission. They've also dropped the weight with the assistance of a lightweight carbon-fibre-reinforced plastic roof and various other components that have received an aluminum upgrade. The new M3 will go on sale at BMW dealers in summer of 2014.