Well, since watching a few of the trailers hidden somewhere on youtube, I noticed that NFS uses the Frostbite 2 engine, the same one running Battlefield 3. However, I don't think that the game will be quite as demanding.
OS: Windows XP,Vista,7
Processor: AMD Phenom II x4 935 or I5 650
Graphics: AMD Radeon 6850 or GTX 460 or better
Graphics Memory: 1GB
Sound: DirectX compatible
I based these on http://www.videocardbenchmark.net
Edit: Any admins/mods can feel free to delete my post. I didn't realize that they released system requirements for this game.