mustang 77Refinements in optional equipment and Decor groups focused on creature comfort, safety and fuel economy. Uncommon luxury in a sporty car introduced potential Ford Mustang buyers in the 1977 Ford Mustang's new brochure.The hhest-performing GT Performance trim is the least efficient with ratings of 90 MPGe city and 77 MPGe hhway. We haven't yet had the 2025 Mach