Hello there :) 
the prefab you just downloaded  was made by me,Conny jonasson 
it a prefab of the Delorian that is seen in Back to the Future movies
i made it in one (1) day  and it has its own Wad file [that i also made :) ]
the Pic that i have to go with was not so great  so i maybe make a new one in the future .

it has
69 solids
and 504 faces

and if you use this in your level [ that includes the wad ]   
please  mail me  at  ssolid_@hotmail.com so i can take a look at it :)

TAKE YOUR TIME TO LOOK AT SOME OF MY OTHER PREFABS 

the scruber droid  ( from starwars the phantom meance )