The 1968 Plymouth Road Runner is a true icon of the American car industry as one of the original muscle cars. Its success is largely due to one famed Chrysler engine. Can you identify it?

Answer 7.0-liter V8

The engine behind the Road Runner's success is, of course, the 426 cu in (7.0-liter) Hemi V8. Equipped with dual four-barrel carburetors, it was a real beast with 425 hp and 490 lb-ft of torque.

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