Quote Originally Posted by Cool Cat GTR
If anyone wants to know where you win certain cars, just post the request and I'll answer. The diary portion of the game allows you to look back and see where you won the cars.
Or they can just look at one of these two pages haha

http://faqs.ign.com/articles/594/594478p1.html
http://faqs.ign.com/articles/594/594362p1.html