In 1988, the Chevrolet 305 cubic-inch displacement (CID) engine, also called the 5-liter V8, was installed in three vehicles: the Caprice wagon, Camaro IROC-Z and the Monte Carlo SS. Each of the three vehicle had small differences between the engines, despite all being the same total displacement. The 305 CID engines in the Camaro and the Monte Carlo were tuned for higher performance than the Caprice wagon's engine.
The Caprice wagon received a less-powerful version of the 305 CID engine. It produced 140 horsepower and 255 ft.-lb. of torque. This engine had a bore, or cylinder width, of 3.8 inches, a stroke, or the piston travel inside the cylinder, of 3.39 inches and a 9.3-to-1 compression ratio. The 305, when installed in the 1988 Caprice wagon, got 17 mpg in the city and 24 mpg on the highway.
The 1988 Camaro IROC-Z had a 305 CID engine that was tuned for higher performance. This engine produced 170 horsepower and 255 ft.-lb. of torque. It had a bore of 3.74 inches, a stroke of 3.48 inches and a compression ratio of 9.3 to 1. When installed in the 1988 Camaro IROC-Z, the 305 CID got 16 mpg in the city and 25 mpg on the highway.
Monte Carlo SS
The 1988 Monte Carlo SS's 305 CID engine had the same 3.74 inch bore, 3.48 inch stroke and 9.3-to-1 compression ratio as the Camaro. However, it produced different power numbers: 180 horsepower and 225 ft.-lb. of torque. The Monte Carlo SS got 17 mpg in the city and 24 mpg on the highway.
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