The 20 Greatest American Muscle Cars Get Ranked!

8. 1970 Dodge Challenger Convertible Hemi

Initial cost: $4,900; value today: $1,500,000 Dodge had never done anything like the Challenger Hemi when it was introduced in 1970. In fact, the model was customized to the point that it had its own speedometer (capable of 150 mph/240 kph) and tachometer (8,000 RPM).

Unsurprisingly, it didn't take long for it to dominate the open market. Customers flocked to the fast car in the years that followed. But what about today? It's even more sought-after now. In fact, the price of the uncommon item will likely reach the millions.