The COPO Camaro's 9.4-liter engine only produces around 430 horsepower, so if you're looking for raw grunt, the slightly smaller 5.7-liter COPO Camaro will give you an additional 130 horsepower, due to efficiency and the supercharger the 5.7-liter engine has attached to it. Additionally, the smaller engine is fitted to Chevy's small block platform.