Her is an interesting website to keep you busy for awhile:
http://cartype.com/
"Welcome to CarType. A comprehensive study and collection of reviews and typographical applications of emblems, car company logos and car logos with images, comments, links, car company information and general interest. Hope you enjoy it, and visit often."
Start with Porsche and find out even more about the logo and crest and then branch out to the more esoteric marques, like FORD
Greg