The 641 643 chassis were designed by John Barnard. These cars are famous for their bottle shape Bodies. Pieces of art which were exhibited in the Museum Of Modern Art in New York. The 643, built for the 1991 F1 season, is equipped with a V12 engine with 710 Horsepower in combination with a 6 speed semiautomatic gearbox.Front-suspension: Double wishbones, push-rod actuated torsion bar springs and telescopic shock absorbers, anti-roll barRear-suspension: Double wishbones, push rod actuated coil springs over telescopic shock absorbers, anti-roll barEngine: Tipo 291, 3. 499 cc (213.