The Saab 96 is an automobile manufactured and marketed by Saab from 1960 to January 1980, replacing the 93. The 96 featured aerodynamic two-door bodywork, four-passenger seating and at first a two-stroke, three-cylinder engine, later a four-stroke V4. Body design Compared with its predecessor, the Saab 93, the 96 featured greater and more easily accessible storage space and larger rear window. The front end was lengthened for 1965 models, in preparation for a new engine, and the radiator was placed ahead of the engine, rather than above and behind, a leftover from the thermosiphon cooling days. Both front and rear windows were enlarged slightly for 1968 models. Engine The Saab 96 had a longitudinally mounted engine layout. As first designed, it had an 841 cc displacement, three-cylinder Saab two-stroke engine. By 1965 this was increased to . An optional version of the engine, with triple carburetors and oil injection, was used in the Sport and Monte Carlo models. The additional power was obtained from a modified cylinder head and filled crankshaft counterweights offering higher overall compression ratio. For 1966 models, the standard 96 841 cc engine, using pre-mix oil, appeared with a three throat Solex carburetor in which the center carburetor handled start, idle, and low speed functions, increasing the power to . The same carburetor had been used in the Monte Carlo and Sport models. A common throttle shaft minimized carburetor synchronization problems. In 1967, Saab began marketing the 96 V4, with the Ford Taunus V4 engine, a four-stroke 1498 cc V4 engine, originally developed for the 1962 Ford Taunus 15M. Saab's project to source a four-stroke engine was dubbed 'Operation Kajsa'. The two-stroke option was offered until 1968. Four-stroke engines had been tested before, between 1962 and 1964 Kjell Knutsson and Ingvar Andersson under Rolf Mellde tested three different engines: a 45 PS Lloyd Arabella of 897 cc; a 33 hp BMC A-Series 848-cc engine and a Lancia Appia engine of 1089cc and 48 hp. However Rolf Mellde's view that Saab needed to switch to a four-stroke engine was stopped higher up by CEO Tryggve Holm. Mellde then went behind the back of Holm and made contact with Marc Wallenberg, son of Marcus Wallenberg, Saab's major stockholder. The coup succeeded and testing could begin. The tested engines were Volvo B18, Ford V4, Triumph 1300, Lancia V4 engine, Opel, Volkswagen and Hillman Imp. The B18 was the most reliable,