18. Chevrolet Camaro Iron Duke
In the early ’80s, Chevrolet introduced the new, fully redesigned third-generation Camaro model. It featured modern styling with improved aerodynamics. The new Camaro was new on the inside as well, with a better suspension and new engines.
However, people expected highly-improved performance. But Chevrolet introduced a base engine in the form of an anemic 2.3-liter four-cylinder engine producing just 90 HP. It was an embarrassing choice since the car had a 20-second 0 to 60 acceleration time.