Supercars are meant to be fast, expensive and good looking, but there is no official definition that exists that automatically qualifies or disqualifies a vehicle from supercar status.
Based on the fact that supercars are first and foremost performance machines the definition has to be performance based. Therefore, a modern day performance vehicle looking to join the supercar club should at least be able to pass the 1/4 mile with a trap speed of greater than 120 mph. This high level of performance sets the bar high even for modern performance vehicles and eliminates the base Corvettes, 911s and even the Ferrari California.
Do you agree with this definition of what makes a supercar, or do you believe that there are more important criteria missing?