Here’s the simplest and broadest definition of a classic car: old. That’s right, the one thing everyone can agree on is that for a car to be a classic it must be old. Did I say, everyone? Well, not including all of those auto magazine reviewers who like to declare some brand new model an “instant classic”. We’ll ignore them for now. So, according to our simple definition, any car that isn’t currently in a showroom is a classic, including the five-year-old Ford Focus you just bequeathed to your college-bound daughter.