1952-1952, 45830 produced.
De Soto had built both six and straight-eight cylinder engines before the war. The first V-8 engine was introduced in 1952. This Firedome V-8 was a modern overhead valve engine that closely resembled Chrysler's Firepower V-8. The engine was 4.5 litres and had a compression ration of 7:1, a twin carburettor, and a hemispherical combustion chamber. The power was at least 162 bhp at 4,400 rpm. The Firedome was one of the most powerful and modern engines of its time. Competitors such as Buick, Pontiac, and Packard only had pre-war straight-eight engines available. Unfortunately this advantage was not fully pressed home. The V-8 was slightly higher than the straight-eight engines and to prevent creating an entirely new body, the designers had constructed an air vent in the bonnet or hood. This vent was given to both the V-8 models and those with six-cylinder engines so that the V-8 lost its exclusivity.
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