1991 was not much better than the previous year, as the Brun team remained faithful to an uncompetitive car. Repsol continued with the team, as did Pareja, Larrauri and Brun –with Sigala and Santal as occasional teammates.
Regardless of the low performance of his Porsche, Pareja was able to to finish six of the eight races on the calendar. He would only retire from the Monza and Autopolis (Japan) rounds of the series, and would not classify for Magny Cours after not completing the minimum distance (he was eleventh across the line). His best showings came at Suzuka, where he drove with Massimo Sigala, and at thee Silverstone and Nurburgring rounds at which he was helped by Larrauri and Brun, respectively. In all three races, he would place seventh. In Mexico, with Sigala, he would finish eighth.
At the 24 Hours of Le Mans, which returned to being a World Championship event, Pareja, Larrauri and Brun used a specially tuned car. They were once again amongst the favourites for the win, and were up into third place before a nighttime crash. A rear suspension breakage caused a delay from which it was impossible to recover, but the team would fight their way back up to tenth.
The title was won by Jaguar and Teo Fabi, whilst the Repsol Brun Motorsport team had to settle for ninth overall, with Pareja eighteenth.
