1977-1979 Mercury Cougar XR7
Marketed as an affordable high-end muscle car, the Mercury Cougar boasted a boxy appearance from the outside. On the inside, however, this car looked nearly identical to the Ford Mustang! In the late ‘70s, the Mercury Cougar had to deal with a huge change. It was given a pretty big weight gain, which just slowed it down. After this new development, the Cougar could no longer retain its reputation as a muscle car. Too bad.

1977-1979 Mercury Cougar XR7
1979 Ford Mustang
Before it became the car that it is today, the Ford Mustang got its start as a slower boxy car. It did not look a lot like it does now. At the time, it did not have much in the way of muscle or crib appeal. The Ford Mustang could only produce 140 hp even though it came with a 5.0-L V8 engine. Over the years, the automaker added a bigger engine and transformed its appearance into something more appealing.

1979 Ford Mustang