Google it. Or there's a long list of backwards compatible games on wikipedia u can check. Or just try it, if ur thinking of renting that off here then WTF! There's at least three next gen need for speed games that are way better.
clearly you like some classic more awesome NFS. well ill tell you this, my need for speed underground 2 works near perfect. As usual the 360 does not promise fluid play, there may be a glitch somewhere but no big deal. Go ahead and try it out. hope i helped! :)