Plymouth Roadrunner Hemi
When it first appeared in 1968, Plymouth Roadrunner proved to be a very influential and important muscle car. The base vehicle was inexpensive at just over $3000, but if you wanted to go all out, you needed Hemi as a top-of-the-line option, which cost over $900. Quite the price for Plymouth, but you would get one of the fastest muscle cars of the era with 425 advertised horsepower, which translated to around 500 HP in real life.