Well, part of what makes it "classic" is that it has stood the test of time, or can be considered timless. People remember it. So yeah, there isn't really a specific number of years, but if you talk to certain people, they will say that it's proved it's timelessness once it's been around for one hundred years.
I didn't like Jane Eyre much. I stopped reading it will about twenty-five pages to go because I knew how it ended, and the book was taking so long to get to that point. It was just so tedious.
