Ferrari 126C3

The 1983 season opened with the 126C2B, a modified derivative of the 1982 championship-winning 126C2 adapted to meet the mandatory flat-bottom regulation that stripped ground effect from all cars. Postlethwaite responded with a deliberately oversized rear wing that recovered approximately 50 percent of the downforce lost to the rule change. The engine continued its development trajectory, rising to around 800 bhp in qualifying and over 650 bhp in race trim — exceeding output that had stood at roughly 600 bhp per race in 1981.

The 126C3 represented a further aerodynamic and chassis revision over the 126C2B, retaining the large rear wing while refining the bodywork and suspension to address handling balance. It was not a clean-sheet design but a disciplined evolution within the same turbo platform, and its introduction from Silverstone onward gave Ferrari a more competitive package for the second half of the season.

Patrick Tambay was the first driver to race the 126C3, taking it to the British Grand Prix at Silverstone. René Arnoux received the car at the subsequent German Grand Prix at Hockenheim, where he converted it into a victory. Between them, Tambay and Arnoux scored four wins across the second half of 1983 and remained credible contenders for the Drivers' Championship into the closing rounds.

Late-season mechanical unreliability ultimately undermined both title campaigns. Despite the individual disappointments, the combined four victories were sufficient to secure the Constructors' Championship for Ferrari — their second consecutive title. The achievement was notable given fierce opposition from turbocharged rivals including Renault and Brabham-BMW, both of whom remained competitive throughout.

The 126C3 sat within the broader four-year Ferrari 126C family, a programme that had begun in 1981 when Ferrari became one of the first constructors to field a turbocharged Formula One car. The original 126CK used twin KKK turbochargers producing around 600 bhp in qualifying trim; by the time of the 126C3 this had grown to some 800 bhp for qualifying. Nicola Materazzi, hired by Enzo Ferrari specifically for his turbocharging expertise gained on the Lancia Stratos Gr 5 programme, had overseen successive iterations of the powertrain.

The series progressed from the 126CK through the substantially redesigned 126C2 that won the 1982 title, to the flat-bottom-adapted 126C2B, and finally to the 126C3. Postlethwaite's oversized rear wing approach — introduced on the 126C2B and retained on the 126C3 — proved one of the more effective solutions in the field to the enforced loss of ground effect, and the 126C3 represented the aerodynamic high point of the turbocharged 126C generation before Ferrari moved to an entirely new concept for 1984.

The 126C3's Constructors' Championship was Ferrari's second in as many turbocharged seasons, confirming that the transition from the 312T flat-12 naturally aspirated programme had been fully vindicated. The four victories scored during 1983 contributed to the 126C series' overall tally of ten wins across four seasons from 1981 to 1984. The car marked the peak of Postlethwaite's aerodynamic work on the 126 family; the subsequent 126C4 would prove a step backward in terms of downforce generation relative to an increasingly competitive turbocharged field, and the 126C3 stands as the most successful individual specification in the series.