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In 1941, the first Chevy 235 engine was produced, though it was used only sparingly in pickup trucks. By 1950, General Motors had opted to use the 235 inline 6-cylinder engine in several car models alongside the "Powerglide" transmissions. It was the Chevy 235 that was used in the first Corvettes, securing the car's place in American automotive history. Because GM manufactured the 235 engine widely for 12 years, all specifications are averaged for basic performance.
General Specifications
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The Chevy 235 was produced for use in Chevy cars for 12 years between 1950 and 1962. All such model engines had a 1-barrel carburetor and spark plug gap of 0.035. The bore and stroke of the 235 was 3.94 and 3.5625 respectively. The pistons had a firing order of 1-5-3-6-2-4 and the piston displacement gave the engine its name with 235 cubic inches.
Compression
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The 235 engine's compression ratio varied throughout its production. The trend moved upward from the engine's first compression ratio of 6.7 to its final of 8.25. Averaged over the engine's 12-year basic production, the 235 engine had a compression ratio of 7.63.
Horsepower
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The earliest 235 model Chevy engine produced 105 hp at 3,600 rpm. In the final year of 235 production, the engine offered 135 hp at 4,000 rpm. The 235 inline 6-cylinder engine produced an average 140.7 hp at 3,940 rpm over its lifetime.
Torque
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Because the 235 was originally designed for use in working trucks, it offered a more powerful torque than was available in most road cars between 1950 and 1962. Averaged over the 235 engine's 12-year car production, the torque came in at 208.2 foot-pounds at 2,080 rpm.
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