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AIMS and objectives behind the decision to adopt the V-type design for the large Buick engine in 1953 models are set forth in this paper. From 1903 until the present time Buick produced cars powered by engines utilizing the overhead-valve principle. The authors cite four main reasons for departing from this long tradition: 1. Newer styling, based on extremely low lines, demands an engine proportioned to fit within allotted space under the hood. 2. A compact V-engine is inherently light in weight, especially in larger sizes. Weight reduction improves car balance, handling, and performance. 3. Improved combustion chambers and fuels permit higher compression ratios. Resulting higher explosion pressures call for a more rigid engine structure, which can be achieved on the V-type. 4. Great strides in engine manufacturing made old tooling obsolete. Since new tooling was needed on the larger engine, the advantage of a type change was indicated.