One of the concept cars Ford displayed at the 1981 Chicago Auto Show was the Mustang RSX. The initials stood for Rallye Sport Experimental. This two-seat sport coupe was designed by Ford's Ghia studio in Turin, Italy. Finished in orange metallic, the body featured simulated all glass doors, and a rear airfoil was used to improve directional stability and lessen wind resistance. With a wheelbase nearly 6-inches shorter than the production Mustang, the lighter RSX came powered by a 2.3-liter four-cylinder engine that was teamed with a four-speed manual gearbox.