For many years, this model was the most powerful American car. This series of high-performing personal luxury cars were the predecessors of muscle cars. Production began in 1955, and by 1958 produced up to 390 horsepower in a fuel-injected version.

Answer Chrysler 300

The Chrysler 300 letter series kept upping the ante, with successively bigger and more powerful engines each model year from 1955-1959.

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