The Audi Avus Quattro was a concept car from the German car manufacturer, Audi. It was first introduced at the 1991 Tokyo Motor Show. The Avus Quattro had an aluminum exterior, which made it a lightweight, sleek and safer automobile.
Ford GT90 - previously a spiritual successor to the Ford GT40; only one GT90 was produced.
Dodge Copperhead - a small roadster designed to be a "poor man's Viper".

Dodge Sidewinder - a pickup truck unveiled at the SEMA convention in 1997.

Opel Frogster - a 2002 car capable of transforming into 3 different body styles with a built-in PDA.