Due to the use of strut front suspension, the Fox platform was designed with a wider engine bay than its Falcon-chassis predecessor. As a result, the chassis was flexible in its use of longitudinal engines, accommodating a wide variety of powertrains, including four-cylinder (naturally-aspirated and turbocharged), inline-6, V6, and V8 engines, ranging from a 2.3L inline-4 to a 5.8L V8 (the most powerful Fox-platform car is the 2003-2004 Mustang SVT Cobra with a 390 hp supercharged 4.6L V8). To further improve the fuel economy of Lincoln Fox-platform vehicles in the 1980s, the platform was adapted for the use of BMW diesel inline-6 engines. The Fox platform was produced in four separate wheelbases, 100.5 inches (for the Ford Mustang/Mercury Capri; lengthened to 101.3 for the SN95 redesign), 104.2 inches (1983–1988 Thunderbird/Cougar), 105.5 inches ("standard"; sedans/wagons), and 108.5 inches ("long"; 1980 Thunderbird/Cougar XR7/ Continental Mark VII/ Lincoln Mark VII/ Lincoln Continental). Design history 1983 model year changes During the early 1980s, the Fox platform would be involved in major changes to many Ford nameplates. In the marketplace, redesigns of the Ford Granada, Ford Thunderbird, and Mercury Cougar had been poorly received by consumers, leading to a collapse in sales for all three nameplates from 1980 to 1982. In addition, fuel prices had stabilized to the point where consumers had shifted back to full-size cars, leading the company to postpone its planned discontinuation of the full-size Panther-platform vehicles. To rectify the sales collapse and capitalize on the move to full-size vehicles, Ford began a major model shift of many of its best-selling vehicle nameplates in all three divisions. For 1981, Lincoln saw the first changes, as the Lincoln Continental was rechristened the Lincoln Town Car; the Lincoln Continental nameplate went on hiatus until it reappeared on a Fox platform mid-size sedan for the 1982 model year (again giving Lincoln a Cadillac Seville competitor). To eliminate further duplication, the Continental Mark VI lived out its model cycle and was replaced by the far more contemporary Mark VII for 1984. For 1983, the Ford and Mercury product ranges saw a number of extensive changes. To move its full-size nameplates upmarket, the Ford LTD Crown Victoria and Mercury Grand Marquis became the sole full-size sedans, while the LTD and Marquis nameplates were moved to the mid-size Fox platform as restyled versions of the Granada and Cougar sedan and wagon to replace those slow selling models. To