muscle car

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A high-performance automobile, often with flashy, sporty styling.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun Any of a variety of high-performance automobiles, especially American 2-door rear wheel drive mid-size cars of the late 1960s and early 1970s equipped with large, powerful V8 engines.