A concept vehicle, show vehicle and a prototype is a car made to showcase new styling and/or new technology. They are often shown at motor shows to gauge customer reaction to new and radical designs which may or may not be mass-produced. General Motors designer Harley Earl is generally credited with inventing the concept car, and did much to popularize it through its traveling Motorama shows of the 1950s.
Concept cars never go into production directly. In modern times all would have to undergo many changes before the design is finalized for the sake of practicality, safety, regulatory compliance, and cost. A "production-intent" vehicle, as opposed to a concept vehicle, serves this purpose. They are also known as prototype cars, but should not be confused with prototype race cars such as the Le Mans Prototype.
Concept cars are often radical in engine or design. Some use non-traditional, exotic, or expensive materials, ranging from paper to carbon fiber to refined alloys. Others have unique layouts, such as gullwing doors, 3 or 5 (or more) wheels, or special abilities not usually found on cars. Because of these often impractical or unprofitable leanings, many concept cars never get past scale models, or even drawings in computer design. Other more traditional concepts can be developed into fully drivable (operational) vehicles with a working drivetrain and accessories. The state of most concept cars lies somewhere in between and does not represent the final product. A very small proportion of concept cars are functional to any useful extent, some cannot move safely at anything above 10 mph.
One of the first plug-in hybrid electric vehicle concept cars. This vehicle was launched with limited availability in certain states in early 2011, with availability in all of the United States, as well as parts of Europe by the end of 2012. The production car is the successor to the failed GM EV-1, originally leased through Saturn dealerships.
The first in a series of 'experimental models', the 1EX was built by Rolls Royce in 1919 on a 40/50 h.p. chassis to test and develop their cars. Individual EX models were produced for over 40 years ending with the 45EX in 1958.The Ghost name Rolls Royce Ghost was adopted in 2011 as a production vehicle. 1EX was also used for the concept version of this Rolls-Royce vehicle.