The 14 Fastest Cars Under $20k

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6. BMW Z3

The BMW Z3 is well-known for its high horsepower of up to 225, depending on the year. Top speeds range from 121 miles per hour to 155, depending on the year and model, with the Z3M and 3.0L being the fastest. The Z3M is slightly different, offering several features perfect for speed. The 3.2L engine complimented the improved aerodynamics of the sports car. M Roadsters and M Coupes both offer a sports steering wheel and gear leaver, bigger brakes and a sleek exterior. While the US version has much less power than its European counterparts, it still has plenty of room for custom modifications. For a cheaper price, look for models produced before 2000, as 2002 models can easily go for over $20,000. If you are looking for a slightly newer car in the same price range, try a Z4.