23. Plymouth Duster 340
As an economy brand, Plymouth was active and successful at the lower end of the market since the early ‘60s with the Valiant model. But by the late ‘60s and early ‘70s, the compact market had grown, so Plymouth introduced the Duster 340. This model was a junior muscle car since it looked like bigger competitors, yet it had a smaller 340 HP engine rated at 275 HP.
Plymouth never anticipated the success the Duster 340 achieved, so they doubled the production in just a few months. The 340 was a good muscle car despite being a compact model since 275 HP moved the light body to respectable 0 to 60 mph times of just over six seconds.
The car may be half the size of some of the heavy hitters of the era but it was almost as fast. Also, it cost just under $3,000, which was affordable. Interestingly, after the original muscle car era ended in 1974, Plymouth continued to offer the Duster 340, but with the 360 engine option and less power due to rising emissions standards.