Open air luxury driving doesn't get much better than in the Audi TT. Drop the top, leave it up, or just get the coupe in the first place and you're behind the wheel of a good looking, fun-to-drive car that scores well on fuel economy to boot. The 2.0-liter turbocharged engine puts out 200 horsepower to the front wheels and includes a six-speed dual-clutch automated manual. Sounds thirsty, right? Wrong! The $36,950 Roadster has an EPA city/highway estimate of 22/29, with a combined rating of 25; the $34,800 coupe is even better, ranking 23/31 with a combined 26 mpg.