The governing body has officially confirmed that no additional power unit upgrades have been awarded to Formula 1 manufacturers following the third and final ADUO review period of the 2026 season. This announcement concludes a series of thorough evaluations designed to maintain competitive balance among engine manufacturers across the grid.
Additional Development and Upgrade Opportunities were introduced alongside Formula 1's fresh power unit regulations for 2026, allowing manufacturers equipped with underperforming internal combustion engines to benefit from extra development pathways. Under the guidelines, manufacturers whose engines sit at least two percent behind the leading power unit can receive additional homologation opportunities, along with increased cost cap and dyno testing allowances.
The latest assessment conducted by the FIA covered races 12 through 18, concluding right after the United States Grand Prix. Although the governing body confirmed that performance gaps among manufacturers fluctuated during the review window, these variances remained insufficient to warrant any further homologation opportunities. During the opening review period of 2026, Red Bull was identified as holding the strongest engine on the grid.
Meanwhile, Mercedes was found to trail between two and four percent behind the benchmark, earning a single additional homologation opportunity for both 2026 and 2027. Ferrari, Audi, and Honda were each assessed as lagging more than four percent behind the reference unit, granting them two extra homologation opportunities per season. With no further opportunities handed out during the second review period following the Hungarian Grand Prix, FIA Single-Seater Director Nikolas Tombazis expressed full confidence in the assessment framework after its inaugural year.
"The FIA has undertaken extensive analysis as part of the review of ADUO this year," Tombazis stated. "Based on the quality of the data and the robustness of the assessment process, we are confident in our findings and the conclusions reached. The first year of implementation has also reinforced our belief that the ADUO concept is the right one for Formula 1."
Tombazis further noted that the federation is actively collaborating with manufacturers and teams to explore potential refinements ahead of future campaigns. The next ADUO review phase is scheduled to take place across the opening six rounds of the upcoming season, beginning in Bahrain and concluding in Miami. Read our in-depth analysis to stay ahead of all technical updates.
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