It is just a name for a particular model with certain similar characteristics. The closeness of the model number designations of one manufacturer to another is deliberately done to cause familiarity and confusion. Remember when a Bel Aire was Chevrolet's top of the line car? Then in the late 1950's, Chevrolet introduced the Impala as the top of the line and the bottom of the line up was the Biscayne with Bel Aire in the middle. Then in 1965, they introduced the Caprice and the Impala dropped one notch on the "luxury" scale, but was still touted as a "top line" Chevrolet. They also dropped the Biscayne and it was the Bel Aire that took its place. It used to be very simple when all the manufacturers used terms such as Master for the best and Standard for the bottom, and each model had a number designation which corresponded to the basic design of the car, such as 2 door or 4 door...