In the thin air of Mexico City's high altitude, the turbos were able to perform at their optimum, while the naturally aspirated cars actually lost approximately 20–25% of their power. This advantage allowed the Zakspeed of Bernd Schneider to qualify an impressive 15th for his first Grand Prix start in what wasn't the most competitive car in the field. Incredibly though, the turbocharged Osella of Nicola Larini with its ancient "Osella V8" (a re-badged Alfa Romeo 890T first seen in 1983), allegedly the most powerful engine in the field, failed to qualify.