I’ve been trying to finish off any lingering achievements and I noticed that several of the 1000 Club Achievements are only possible if you can obtain DLC cars. For example, without DLC cars there are not enough Fords, Nissans, or BMWs available in the Autoshow to be able to complete those Achievements - FORD CHAMPION (Medal in 13 different Fords), NISSAN NINJA (7 different Nissans), WELL ENGINEERED (10 different BMWs). Anyone know which ones are possible to accomplish or if there are any ways to otherwise complete these Achievements?
If I remember correctly, the three you mentioned are the only ones that cannot be attained without DLC. Everything else should be able to be gotten. Good luck and good racing!
Also thing to keep in mind, is the fact, that those car packs may not work. I bought the collectors edition couple of months ago, that came with all the bells and whistles, and I also managed to get the rally expansion. Only thing that worked are the day 1 dlc (or VIP pack or whatever it is called) and the rally expansion. None of the monthly car packs are working.