Plymouth Horizon TC3
The Plymouth Horizon TC3 finds itself among the worst muscle cars due to a departure from the high-performance expectations of the muscle car category. Introduced in the late ’70s, the TC3 featured conservative styling and lacked the powerful engines associated with its muscle car counterparts. Its underwhelming performance failed to excite enthusiasts, making the Horizon TC3 a less-than-memorable entry in the world of muscle cars.