All Pontiacs were powered by various renditions of the new 389 cubic-inch Tempest V8 (which was later renamed from 1961 as the Trophy V-8), which was basically a version of the previous 370 cubic-inch V8 with stroke increased to 3.75 inches (the 370ci was used in 1958-model Pontiacs and based on the Pontiac V8 design introduced in 1955). Catalinas came standard with a version of the 389 with two-barrel carburetor and 8.6 to 1 compression mated to the three-speed manual transmission. When the optional four-speed Hydramatic transmission was ordered, the standard engine was version of the same engine with higher 10.5 to 1 compression ratio. Available as a no-cost option with the Hydramatic transmission was the 215-horsepower 389 (dubbed the Economy V8) with 8.6 to 1 compression ratio which burned cheaper regular gasoline, instead of the premium and super-premium fuels required for the high-compression engines, and capable of achieving more than 20 MPG on the highway. Optionally available at extra cost were higher-power versions of the 389 V8 with four-barrel carburetion rated at with manual gearbox or 303hp with Hydramatic, a 4-barrel carburetor version with a horsepower rating of 318hp, or "Tri-Power" options with triple two-barrel carburetors and 330hp or .