10. Plymouth Fury Roadrunner (1975)
We all know Plymouth Roadrunner as one of the quintessential classic muscle cars that always had performance and power. However, for 1975, Plymouth moved the Roadrunner as an option on the Fury line (via MotorTrend).
The Fury Roadrunner had a 440 V8 option with 260 HP on paper. Despite this being a respectable number for the day’s standards, the 0 to 60 mph times were over eight seconds which is something that today’s cheapest economy cars can match. As a result, sales were pitiful.