BMW launched its 1 series a few years ago in Europe, as its 3 series has outgrown its entry-level roots. For the U.S. version, BMW turns it into a performance monster. The heart of the beast, a twin-turbo, 3-liter, straight-six-cylinder engine, puts out 306 horsepower and 295 ft-lbs. of torque. With its coupe styling, the 135i looks to be a real sleeper, a car you can blast off the line, surprising any number of gaudier sports cars.