Is it a combination of speed, price,bigger engine, and rarity? Some cars are rare may due to limited edition or end of line. There are plenty of cars with massive engines in them but they dont exactly qualify as one and in terms of speed most car are pretty fast these days. I sometimes think maybe supercars are not what they are hyped up to be. Another thing i was gonna ask is - Toyota supra, Mitsubishi GTO and cars within that range, do they count as supercar?