The two-passenger 2007 Porsche Boxster’s primary competitors include the Audi TT with optional all-wheel drive, the base BMW Z4 or $52,000 and 330-horsepower M Roadster, and the $53,000, 400-horsepower Chevrolet Corvette. However, if you expand the field out a bit to encompass more models that match the Porsche on horsepower and/or price, the competition grows to include the rev-happy, 237-horsepower Honda S2000, the $44,000 Lotus Elise, and the potent, 306-horsepower Nissan 350Z Roadster.