11. Ford Mustang E
In 1969, a whole new redesign of the Mustang appeared in showrooms across the country. Besides the new regular production models like the luxury Grande, sporty Boss 302, Boss 429, and Mach I, there was one rare special version they simply called the “E,” which was short for “Economy.” This special version featured the base 250 CID straight-six engine and an automatic transmission with a special torque converter.

Strangely, it had a low rear axle ratio. The Mustang E prepared like this was an economical machine with great fuel economy. But, since it appeared in the middle of the muscle car craze, nobody paid attention to this economy model. At the time, everybody was interested in those high powered, gas-guzzling models. And that is why Ford only built 50 of the Mustang E.