Who would win in a fight? Darth Vader or the terminator?

im asking because at lunch, me and my friend were sitting in the library just eating our lunch, minding our own business -when we over hear the guys sitting at the table next to ours shouting about darth vader and the terminator and which one of them would have won in a fight. of course me an my friend looked at each other and tried to conceal our laughter. now it's just a huge joke between me and her, one of us will walk up to someone and ask them that question - usually the girls look at us like we're crazy -- while the guys actually think about it. so, who do you think would win?