18 Muscle Cars That Broke Their Own Rules

13. 1979 Ford Mustang Turbo Cobra

The 1979 Ford Mustang Turbo Cobra broke with muscle car tradition by forgoing a V8 in favor of a turbocharged four-cylinder engine. Introduced during an era of strict emissions regulations, it was a bold and forward-thinking experiment. The Turbo Cobra’s innovative powertrain foreshadowed the popularity of turbocharged performance cars in later decades. Read about this pioneering Mustang at MotorTrend.