1974 Ford Mustang II Cobra II: This model marked a departure from the traditional Mustang muscle car, featuring a smaller size and reduced performance.
1980 Chevrolet Camaro Berlinetta: The performance of this Camaro was compromised by emissions regulations, resulting in lackluster power.
1971 Plymouth Satellite Sebring Plus: With emissions controls affecting performance, this model suffered a decline in horsepower compared to earlier muscle cars.
1975-1980 AMC Pacer: Although not a traditional muscle car, the Pacer's lack of performance and unconventional design contributed to its negative reputation.
1975 Pontiac Ventura Sprint: The Ventura Sprint faced criticism for its modest performance and lack of true muscle car attributes.
1971 Dodge Demon: While the Demon had a powerful engine, its name and association with the occult led to controversy, affecting its market reception.
1982-1984 Cadillac Cimarron: Marketed as a luxury compact, the Cimarron failed to live up to expectations and was essentially a rebadged Chevrolet Cavalier.
1975-1976 Bricklin SV-1: Though not a traditional muscle car, the SV-1's performance was underwhelming, and the gull-wing doors proved troublesome.