Also commonly referred to as an exotic car, a supercar is a very fast and expensive sports car.  Most of the time, automakers (both big and small), market supercars as unusual and rare automobiles specially produced on a limited basis. These are typically “standard” cars that are beefed up for more power and better overall performance. 

Supercar is also a term used by custom car retrofitters to describe their special project vehicles that are featured in their showcase. These are usually sports cars, grand touring automobiles, or muscle cars that have been modified extensively with the most modern street-legal racing technology.