Very probably built using a P4 chassis with a 3-litre V12 rear-mounted engine derived from Formula 1, Pininfarina presented the P5 prototype at the Geneva Show which was a perfect illustration of the collaboration between Ferrari and Pininfarina on a competition berlinetta. This aerodynamic design, which was both admired and disliked by the critics, was used as the chassis for production of the Ferrari BB which borrowed several stylistic elements from it.