For the 6th round of the year, the World Sports Prototype Championship again returned to British soil. Aston Martin therefore decided to run two AMR1s at Donington Park, debuting newly built chassis #05. The two cars were able to finish 6th and 7th. Both cars raced again at Circuit de Spa-Francorchamps where Aston Martin suffered their only other failure to finish in the season, chassis #04 having suffered engine failure. However, chassis #05, which had now been upgraded with an even more powerful 720 hp, Version II 6.3 L V8, was able to finish a respectable 7th. For the final round in Mexico, Aston Martin decided to take only chassis #05, where they finished 8th.