The cubic-inch displacement of Chrysler’s famous Hemi engine was 426 cubic inches.
The 426 Hemi was Chrysler’s second-generation hemispherical-head V8, developed initially for racing. Its competition version appeared in the 1964 season, helping Plymouth dominate NASCAR events, including the Daytona race. Chrysler later introduced a detuned Street Hemi for 1966 production cars, allowing the engine to meet homologation requirements and become available to a wider group of muscle-car buyers.
The “426” identifies engine displacement, not horsepower or the engine’s generation. The name “Hemi” refers to the hemispherical combustion chambers, which permitted large valves and strong high-rpm breathing. The engine earned the nickname “elephant” because of its substantial physical size, weight, and power.
The 383, 392, and 440 in the answer choices refer to other Chrysler engine displacements or engine families. They are not the displacement of the 426 Hemi. The engine appeared in cars including the Dodge Charger, Plymouth GTX, Road Runner, and Superbird.