Oldsmobile made a major impact on automotive engineering in 1949 when it introduced its Rocket V-8. Like the Cadillac V-8 that appeared almost simultaneously, the Olds engine was made up of a set of design features that led to its being described as the modern overhead-valve V-8.

Again like the slightly larger Cadillac V-8, it moved the valves from the block to the heads and used oversquare proportions as each piston’s stroke was shorter than its cylinder’s diameter. Efficiency was improved as size decreased; the new 304-cubic-inch engine produced 135 horsepower, according to Motor’s Manual, compared to the earlier inline eight’s 115 horsepower from 257 cubic inches, and the years would see it grow.

Big Engine and Small Body Add up to 1949 Olds 88

Oldsmobile used two wheelbases for its 1949 models, with the six-cylinder 76 series measuring 119.5 inches and the V-8-powered 98 measuring 125. The smaller 76 chassis naturally was also lighter – about 300 pounds lighter in the case of convertibles – so giving it the new V-8 guaranteed that the new 88 would be fast. It wasn’t just the weight difference, of course; to become the 88, the 76 body gave up a 105-horsepower six that, according to Setting the Pace, coincidentally displaced the same 257 cubic inches as the old eight.

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