Exclusivity, top-of-the-line tech in every part of its construction. expensive, limited production, stand-out-in-a-crowd looks.
Doesn't have to have ALL of those to be a supercar, but having most of this is a good starting point. I see supercars as an upper tier of sportscars, by the way. With the so-called "hypercars" at the top (Veyron, most of the Koenigseggs, SSC Aero and other craziness that has come out lately).
I wasn't aware of Noble only making the one car, so maybe they can be included.
