i think a pretty major problem is the lack of consistancy in the smothing. What i mean by that is the front nose cone bit (with the exception of the front spoiler) has nicely beveled realistic edges. But the sort of chunky bits beside the driver have no curvature so they have that ps1 game early cg look to them. If the entire car were in that highly polygonal style and thats what you intended then that could have some stylistic quality to it. But as is it just looks tacky and incomplete. Also the grooves on the tire are too large a detail to just do with that texture map.
just some friendly c&c