Mercury Cougar
The Cougar was built on the Mustang platform. But it was stretched a couple of inches to add comfort and achieve better ride quality. Also, the Cougar was available with V8 engines only. The smaller six-cylinder units were reserved for entry-level Mustangs. The body panels and front fascia with hidden headlights were all unique (via Motor Trend).
Mercury offered a wood-trimmed dash, leather seats, and all kinds of comforts in the interior. Some could say that the Cougar was just a luxury Mustang, but in reality, it was an independent model and a successful car in its own right.