The ARX-01d, fitted with HPD's new LMP2 stock-block V6 engine, had been run in the Le Mans Series and at Le Mans by defending Le Mans LMP2 winners Strakka Racing and by defending LMS LMP2 champions RML. At the Paul Ricard test the cars were very slow due to the level of engine development prior to homologation. RML stated that they were literally the slowest car of the whole field, and that "there's not a class out there that can't drive by us on the straight". They did mention that the car was not in low drag configuration so the car was not in an optimally efficient condition.