Fiat 550 Turbo
This is not exactly a sports car but it does have energy and a sporty performance for under $20,000 which is hard to get anywhere else unless you buy a used sports car. The engine installed under the hood is a 1.4 liter MultiAir in-line four, however, you get added pep with the turbocharger that gives the engine quite a boost by 34% in its horsepower and adds 150 pound-feet of torque. Because this is a lightweight automobile with a sport-tuned suspension, this combination is going to give you some real, get-up-and-go. Fuel efficiency is outstanding as well, at 34 mpg. The Fiat 500 Turbo has been deemed an impressive car for under $20,000.