In Spain you can declare a car as "historic" (or classic as said many times) when it's older than 25 years old i think, no matter it's model or brand, they have some limitations but well these are just disadvantages of declaring it as classic, like only going to the inspection every longer period of time or having a limited amount of kilometres to do during the year, i don't think i'd ever declare a car of mine like that, you also must change the number plate to another uglier and modern one begining with an "H" and followed by several numbers.