Ive never seen the old Mad Max movies. Are they just as good as Fury Road?.
Interestingly, they are all very different movies (but all involve the same central character).
Mad Max (1979) has the feel of a low budget, 70's cult film - it's still a good action & revenge film - but as pointed out, it's pre-apocalyptic. So it's somewhat standard fare (story-wise) about a cop who loses it and goes all vigilante on a murderous motorcycle gang that kills his family. Cinematically, it is unique.
Road Warrior (1981) is much more Hollywood (I don't mean that in a bad way). Bigger budget, elaborate action scenes, much more epic in its feel. It's like somebody liked the Mad Max character enough to give him a major film treatment. Here, the setting is post-apocalyptic. Something's happened so that gas is worth killing over, society has collapsed and the land is overrun with marauders. Max is still the same character, but now he has bigger worries than one violent motorcycle gang as he must chose between helping a small band of innocent survivors under threat or look only to his own survival (being the protaganist, it's obvious which direction he takes).
Beyond Thunderdome (1985) - personally, this is my least favorite as it diverges even further from the first two. Societies are reforming, but as primitive, barbaric places. Unlike the first two films which have very simple, very cohesive plots - this one finds Max trying to cope with a couple different situations in a strange, post-apocalyptic world.