19. Mercury Capri RS (1980)
The introduction of the third generation Fox-body Mustang also had a significant influence on Mercury since the brand got its version in the form of the Capri in 1979. Since it was a Mercury product, it was more upscale than Ford. But other than a few aesthetical changes, it was identical to the Mustang (via Auto Trader).
Mercury introduced the RS model as the performance version, which featured a 2.3-liter turbocharged engine with a whopping 135 HP. The performance was expectedly bad, but the car looked cool with a large air intake on the hood, big RS badges, and a rear spoiler. Those RS models are rare today, although not very valuable or sought-after by the collectors.