BMW Z4

The Z4 is a sporty, two-seat ragtop that comes in three flavors. The base 2.0-liter four-cylinder sDrive28i is offered with either a six-speed manual or eight-speed automatic; there are two 3.0-liter twin-turbo sixes: the 300-hp sDrive35i and the 335-hp sDrive35is. The former is offered with a six-speed stick or seven-speed dual-clutch auto, while the sDrive35is is offered only with the automatic. Regardless of the model, however, the Z4 is not one of our favorite sports cars.