Pre-production cars are vehicles that allow the automaker to find problems before a new model goes on sale to the public. Pre-production cars come after prototypes, or development mules which themselves are preceded by concept cars. Pre-production vehicles are followed by production vehicles in the mass production of them for distribution through car dealerships.
Pre-production cars are typically built in small quantities on a slave production line, or in some cases on the real production line alongside the current model. Typically the parts used will be off the production tooling, or at least are intended to represent the final part very closely. Sometimes the components used to make a pre-production car are a mix between the prototype models and the mass production versions to come later.
- "... A pre-production car is a car is like a beta version of a software program — it's used for demonstration and evaluation purposes of an all-new vehicle...."
Manufacturers sometimes use pre-production cars to provide the automotive press a chance to experience and create publicity and articles about the models that are yet to appear in dealer showrooms for public view. Some of these cars are exhibited at auto shows. They may also be destroyed during crash tests. Most of the rest are scrapped, as some may not meet automobile safety regulations or emission standards.
An example was the Dodge Tomahawk motorcycle, that "that hundreds were projected to be built", but even the few that were sold "do not meet the legal requirements to be classified as a motorcycle by the U.S. government, or to be driven on the street". Additionally, pre-production cars may be used as the prototypes (also known as a development mule) for test work for the next model.
Another example are the evaluation mules or a "pre-production" cars built early on during a model year with some of changes that are going to be incorporated in the manufacture of the next model year models. In the case of American Motors (AMC), these included appearance modifications such as grilles, tail lights, trims, or interiors that were fabricated in clay, fiberglass, wood, or plaster. These experimental vehicles were road tested in anticipation of consumer demand and regulatory changes. Designs were tested in these cars in response to customers and drive reports, as well as to include better solutions such as making the ashtray and cigar lighter user friendly.
Preston Tucker developed the radically designed 1948 Tucker Sedan for the postwar car market and purchased a factory in Chicago for building the pre-production cars. Automakers may assemble pre-production cars in a specialized small facility, often by hand, to try out the new tooling, as well as test vehicle assembly fits and techniques. This is also an opportunity to train foremen and supervisors for volume production, sometimes ten months before pilot assembly of the new cars.
In some cases, pre-production cars may be built before management has made final marketing decisions. Although the Nash and Hudson brands disappeared for 1958 in favor of a unified Rambler line under AMC, pre-production cars included the Nash or Hudson emblems ahead of the Ambassador nameplates on the sides of the front fenders, and early factory literature has visible airbrushing to eliminate the emblems. Chevrolet built 43 pre-production, third-generation Corvettes, but none were released to the public as the automaker skipped over the 1983 model year and decided to introduce the new cars as 1984s with an extended production run.
Automakers also design production prototypes to experiment and help develop new standards and regulations. Major safety improvements may be taken into account during the initial development stages of vehicles, but not removed from actual production cars even after proposed stiffer regulations are rolled back. The AMC Pacer was designed with shortened ends, but incorporated "new impact energy absorbing ideas" to perform at higher crash speeds than the final U.S. regulations mandated for the 1975 model year production.
- "DeLorean - The Car: Prototype, Pre-Production, Production Comparison". Babb Technology. 8 April 2008. Retrieved 24 July 2010.
- Romans, Brent (13 March 2002). "Kittie Redux". Edmunds Inside Line. Archived from the original on 3 April 2009. Retrieved 24 May 2012.
- "Destruction of the Research Safety Vehicle". Center for Auto Safety. Retrieved 24 July 2010.
- "The Dodge Tomahawk Concept Motorcycle". Allpar com. Retrieved 24 July 2010.
- "Prototype AMC AMX Running Changes; Genius On A Budget". Plant Houston AMX. Retrieved 24 May 2012.
- Flory, Jr., J. "Kelly" (2008). American cars, 1946-1959: every model, year by year. McFarland. p. 8. ISBN 9780786432295.
- "Detroit listening post: Chrysler gears up". Popular Mechanics 154 (2): 28. August 1980. Retrieved 24 May 2012.
- Gunnell, John, ed. (1987). The Standard Catalog of American Cars 1946-1975. Krause Publications. ISBN 9780873410960. Retrieved 24 May 2012.
- Mueller, Mike (1996). Corvette Milestones. Motorbooks. p. 73. ISBN 9780760300954. Retrieved 24 May 2012.
- Iacocca, Lee A. (January 1977). "Making automobile rules work better". Environmental Science and Technology 11 (1): 32–35. doi:10.1021/es60124a016.
- Committee on Appropriations, House of Representatives, Ninety-fourth Congress, first session. Department of Transportation and related agencies appropriations for 1976, Volume 2. U.S. Government Printing Office. p. 329.