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307 V8 Chevy Engine Specifications

by Madison Rayne

The Chevy 307 V-8 engine was introduced in 1968 to replace the Chevy 283 V-8. This engine was designed to function well in low-performance vehicles such as sedans and other family-friendly cars. This engine only lasted five years, with the last model being produced in 1973. Soon after, the Chevy 307 V-8 was produced for high-performance marine engines and sold to the Outboard Marine Corp.


The Chevy 307 V-8 has a displacement of 5.0 liters, or 307 cubic inches. The engine uses a bore and stroke of 3.875 inches by 3.25 inches. The compression ratio is 9-to-1.

Power and Output

The horsepower and torque of the Chevy 307 engine varied slightly from 1968 to 1973. The 1968 to 1971 engines have a maximum brake horsepower of 200 at 5,800 revolutions per minute and a torque of 300 foot-pounds at 4,200 rpm. The 1972 engine has a maximum brake horsepower of 130 at 4,000 rpm with a torque of 230 foot-pounds at 2,400 rpm. The 1973 engine has a maximum brake horsepower of 115 at 3,600 rpm with a torque of 205 foot-pounds at 2,000 rpm.


The Chevy 307 V-8 engine has a two-barrel carburetor. This type of carburetor performs well in low-performance vehicles. It works by regulating the ratio of air and fuel, and controlling the engine's speed.

Oil Pressure and Spark Plugs

The Chevy 307 V-8 has an oil pressure range of 30 to 45 pounds per square inch (psi). The engine has AC-R45S-type spark plugs with a 0.035 gap.

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