The FIA’s latest Additional Development and Upgrade Opportunities review again rated Red Bull-Ford Powertrains’ internal combustion engine as the strongest in Formula 1, based on races from Melbourne through Budapest. Mercedes was placed in the 2-4% performance window, while Audi, Ferrari and Honda were assessed at more than 4% off the pace. Honda’s new powertrain, introduced at the Dutch Grand Prix, was not included in the assessment.
The results triggered extra development allowances for the manufacturers behind the leading engines. Mercedes will receive additional homologation opportunities in 2026 and 2027, though reports differed on the exact 2027 total. Audi, Ferrari and Honda will each receive two additional homologations in both seasons, along with corresponding cost cap and dyno testing increases. The FIA said no manufacturer was granted additional homologations in the second review period.
The ADUO process has drawn criticism because it measures only the internal combustion engine. Red Bull also asked for a review of the post-Canada results, but that request was unsuccessful. The third review period is set to cover races 12 through 18, from the Dutch Grand Prix to Mexico City, with the next assessment scheduled after the Mexico City Grand Prix.
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