What is Edmunds' definition of a "Factory Tuner"?
A "Factory Tuner" is a vehicle model that has significant engine and/or chassis upgrades as compared its parent model. It is built at the factory and typically has a name that includes a "factory tuner" designation (e.g. Mercedes-Benz "AMG" or BMW "M"). Examples include the BMW M3 and the Cadillac CTS-V.
To look up the meaning of other automotive terms, please see our Glossary.