The fourth generation of the Ford Thunderbird is a large personal luxury car produced by Ford for the 1964 to 1966 model years. This generation of the Thunderbird was restyled in favor of a more squared-off, "formal" look. The Thunderbird's sporty image had by that time become only that: the standard 390-cubic-inch 300 bhp (224 kW) V8 engine needed nearly 11 seconds to push the heavy T-bird to 60 mph (96 km/h). The softly sprung suspension allowed considerable body lean, wallow, and float on curves and bumps. Contemporary testers felt that the Buick Riviera and Pontiac Grand Prix were substantially more roadworthy cars, but the Thunderbird retained its leading market share.
A black 1964 convertible later had a major role in the TV series Highlander: The Series as protagonist Duncan Macleod’s main mode of transportation. A green 1966 Thunderbird convertible was prominently featured in the 1991 Ridley Scott film Thelma and Louise, starring Susan Sarandon and Geena Davis, a red 1966 Thunderbird convertible was featured in the 1983 film The Outsiders which was directed by Francis Ford Coppola, and a green 1966 Thunderbird Convertible was featured in the David Lynch film Wild at Heart, starring Nicolas Cage and Laura Dern.