In 1968, Plymouth presented a wholly outrageous new model to its clientele: the Road Runner. Here are the results of our Auto123.com road test!

The 426 Hemi was the only optional unit until 1970 when the engine lineup also included a six-barrel 440-cubic-inch good for 390 horsepower. In 1968, the GTX was joined by Road Runner.

In early 1968, Plymouth added the hardtop body to the Road Runner's list of extra-cost add-ons, and the sales reflected the buyer's preference for the pillarless shape. By the end of the model ...