Here is my 8 wide version of a stock car. I like how it turned out, using tiles separated with brackets spaced by 2 1x2 plates. Though I haven't documented it very well, I also am very happy with the way the underframe turned out-- I think it adds a lot of realism to the MOC.
Now here is what it looks like after I "painted" it;-) This is the stock car from my Santa Express which Santa uses to haul the reindeer around for pre-Christmas appearances. Though it is a vintage, wooden car, note the very modern Thermal KingŪ refridgeration unit in the second pic, which keeps Santa's Artic-native reindeer nice and cool for visits to malls in places like Arizona and Florida:-)