This is mine - I wonder what yours is.

1/ 2 seats and open top with eception made for 911 on basis that its rear seats arent useable.
2/ no ecu or turbo
3/ small volume production appreciated as something special in its day
4/ manual gearbox
5/ capable of a club sprint or hillclimb without modification

So in British terms, a big Healey is a classic sports car but a Triumph Stag is not. And certainly an RS 2000 isnt a sports car full stop.