6. Mercury Cougar XR-7
Some people think of a Cougar only as a Mustang with a longer wheelbase and luxury interior. But Mercury’s muscle car was much more than that. With its unique styling and trim, it was an independent force in the muscle car wars of the late ’60s. The ultimate version that perfectly combined muscle car power with luxury was the mighty Cougar XR-7 (via Hemmings).
This model had the 390 V8 engine with 320 HP. But buyers could also opt for the GT package, which included a beefed-up suspension and stronger brakes. Over the years, the Cougar was in the shadow of the Mustang.