Whether or not a car is a classic cannot be defined just by the age of the car. Not everyone will agree that a car is a classic either. Small Fiats achieve classic status quickly, larger Fiats don't. Is the Fiat Regatta a classic or just an old car? The Bravo isn't a classic, it's a modern car as is the Tipo. The Panda has a case for being a classic, increasingly so does the Cinquecento, the Seicento doesn't. What about the Uno? I'd consider the Mk1 and Turbo models to be getting there but the Mk2 is just an old car. It'll be impossible to get everyone to agree on what is classic and what isn't.