A car platform is a shared set of common design, engineering, and production efforts, as well as major components, over a number of outwardly distinct models and even types of cars, often from different, but somewhat related, marques.[2] It is practiced in the automotive industry to reduce the costs associated with the development of products by basing those products on a smaller number of platforms. This further allows companies to create distinct models from a design perspective on similar underpinnings.[2] A car platform is not to be confused with a platform chassis, although such a chassis can be part of an automobile's design platform, as noted below.
Used luxury cars can be great buys, if you ignore all the hype, know how to separate symbol from substance, and are smart enough to know that most of the high-end models don't give you much more than their lower-priced entry-level versions. For example, the Lexus ES 300 is a Toyota Camry with a higher price.