12. Chevrolet Monte Carlo SS
Chevrolet revealed the first Monte Carlo in 1970. They built it on a modified Chevelle platform, and the Monte Carlo was a handsome coupe-only car. It came with a V8 engine, nice interior, and decent performance. Most Monte Carlos had the smaller V8 engine that customers concentrating on the luxury aspect bought. However, there was one crazy muscle option in the form of the SS 454 package.
The 454 version was a true full-size muscle beast with a monstrous 7.4-liter V8 engine that pumped 360 HP. It propelled the heavy Monte Carlo to amazing 0 to 60 mph times. For just $420 above the base price, buyers could get this trim level which transformed this coupe from a somewhat lazy cruiser to a quarter-mile beast. But because only around 3,800 people decided to buy it, the Monte Carlo SS 454 is one of the rarest luxury muscle cars they ever produced.
The reason for such a low number is obvious. At the time, Chevrolet had a few muscle cars in their model lineup, so most speed enthusiasts turned to the Chevelle, Camaro or Corvette for performance and looks. On the other hand, a typical Monte Carlo buyer preferred comfort and luxury, so the SS 454 option was left somewhere in the middle, which contributed to the poor sales numbers.