http://www.cnn.com/2014/05/23/travel/dream-concept-cars-museum-exhibit/index.html

I think one of those was used in Fallout 3 right, or was that a different car?

No, you're thinking of the http://en.wikipedia.org/wiki/Ford_Nucleon, a car that would run on a small nuclear reactor. Suffice to say, it never left the concept design phase.

http://www.youtube.com/watch?v=LuDmCOFrId0