FIA Revises ADUO Engine Regulations Amid F1 Calendar Reduction
The FIA has officially confirmed adjustments to the regulations governing Additional Development and Upgrade Opportunities (ADUO). This regulatory tweak comes in direct response to a significant shake-up of the race calendar, specifically the cancellation of the Bahrain and Saudi Arabian Grands Prix, which has provisionally reduced the season to 22 rounds.
Introduced ahead of the current campaign, the ADUO system was designed as a safety net to provide additional support to any engine manufacturer lagging behind the benchmark. With the sport entering a new regulation cycle and newly developed power units being introduced this year, the framework is intended to prevent long-term competitive imbalances.
Rescheduling the Review Points
Originally, the FIA had outlined three specific review points during the season to assess engine performance: after rounds six, 12, and 18. However, the truncated calendar has necessitated a shift in this timeline.
The governing body has now adjusted the ADUO review periods to align with the revised schedule. The first assessment is now scheduled to take place after round five in Canada. The second review will occur after round 11, which is currently set to be the Hungarian Grand Prix. The final evaluation remains unchanged, scheduled to take place after round 18 at the Mexico City Grand Prix.
The 10 Percent Deficit and Honda's Lifeline
In a further critical change to the sporting framework, the FIA has clarified the threshold for intervention. Any power unit manufacturer deemed to be more than 10 percent behind the benchmark will be granted an additional 230 development hours.
At the start of the season, it quickly became evident that Honda was significantly trailing the benchmark upon its return to Formula 1. Consequently, the Japanese manufacturer is almost certain to be the primary beneficiary of the ADUO system.
While the power unit manufacturers broadly support the initiative, Mercedes team principal Toto Wolff has offered a note of caution regarding its implementation. Wolff warned that the system should be used solely to help a competitor catch up, rather than to influence the competitive order.
Simone Scanu
Heâs a software engineer with a deep passion for Formula 1 and motorsport. He co-founded Formula Live Pulse to make live telemetry and race insights accessible, visual, and easy to follow.