American cars with large engines produced between the 60's to the late 70's. Although many American car manufacturs claim that they are producing or have produced "muscle" cars is the center of much debate. Modern day Corvettes, GTO's, and Vipers are argued to be the "modern day muscle" cars.
American mucsle cars are considered the first "ricer" cars of their time. They were loud, relativley inefficient, status symbols, and not well rounded performers. Regardless, they were very fast and still hold their own against the more modern day performers.
American "muscle" car owners and enthusiasts often despise and put down the Japanese and European car manufacturers. This feud has derived from a bitterness of introducing Japanese and Euro compacts in the states during the late 70's. These cars, often much lighter and easy to modify started out performing the "muscle" cars on the drag strip.
American muscle cars are dumb cars, they accomplish straight line performance on a clean drag strip.
Import cars are smart cars, they utilize the latest technologies and materials to maximize performance without sacrificing reliability.