In 1986, he switched to a Porsche 956 from Richard Lloyd Racing's outfit, returning to a works drive in 1988 with the Sauber-Mercedes team, with whom Baldi won the 1990 FIA World Sports Prototype Championship for Drivers, sharing the car with Jean-Louis Schlesser.
En 1986, cambiou a un Porsche 956 do equipo Richard Lloyd Racing, volvendo a unha unidade oficial en 1988 co equipo Sauber - Mercedes, con quen Baldi gañou o campionato mundial de coches deportivos da FIA de 1990 , compartindo o coche con Jean-Louis Schlesser.