The DeLorean (though in custom red, of course). No other car was as roundly mocked when it first came out, full of shortcomings and missed promises. Even its creator was ridiculed and humiliated (but thats another story). But look at it now - it certainly did go down in history!
When I was growing up, Robert L. May was our neighbor in Skokie, IL. I went to school with his son and remember riding in this coral colored 56 Lincoln sedan. Both my sister and I have autographed Rudolph the Red Nose Reindeer book as well as the sequel book that he wrote. I would vote for a coral colored 56 Lincoln Sedan for the theme of Rudolph being a car.