Project CARS 2 Fun Pack DLC minimum requirements for Windows assume having at least Windows 10 (+ specific versions of 7) operating system. Your processor should be 3.5 GHz Intel Core i5 3450, 4.0 GHz AMD FX-8350 or a more powerful one. The minimum RAM requirement is 8 GB. As for a graphics card, it should be GTX680, and it should support Direct X Version 11. You also have to have 50 GB free disk space to install the game.
If you go for recommended requirements for Project CARS 2 Fun Pack DLC for Windows, your operating system should be Windows 10. Recommended CPU would be Intel i7 6700k CPU or equivalent. For RAM, it is recommended to have 16 GB or more. And video card — NVidia GTX 1080 or AMD Radeon RX480. It should also support Direct X Version 11.