DiRT Rally 2.0

Simply purchase a Rallycross Supercar. These cars cost between 300,000 and 400,000 credits.

In order to do this, go to your Garage and hit the “Purchase Vehicles” button on the left. Here, you will see all the vehicles from every class that you can purchase. Hit a bunch of times until you reach the section for Rallycross Supercars. Buy whichever one you fancy and the achievement will immediately unlock. If you buy a used car, you will make progress toward “Some Minor Wear and Tear.”

If you don’t need/want one of these cars, you can resell it immediately after. Head to your Garage, highlight the car, and press . You will receive about 50,000-100,000 fewer credits than what you purchased the car for.

EDIT: Per the comment from WhoIsJohn117, you must purchase one of the Rallycross Supercars from the base game. DLC cars such as those from the Rallycross Supercars 2019 set will not work.