For testing purposes Porsche Motorsport built a few tarmac rally cars based on the Cayman 981 GT4 racing version. The Cayman rally car was the course car for the WRC (World Rally Championship) 2018 ADAC Rallye Deutschland. The FIA R-GT Cup was contested on tarmac rounds of the ERC and WRC, like the German WRC event. For Porsche, the entry of a concept study based on the near-production GT circuit race car was a critical test under real conditions.
