FIA confirms third ADUO ruling, Red Bull still unable to upgrade

The FIA has concluded the third round of analysis of Formula 1 engine performance under its Additional Development and Upgrade Opportunities (ADUO) system, leaving the order unchanged. Red Bull remains the only manufacturer unable to upgrade its power unit under the catch-up mechanism.

Mercedes falls in the 2-4% window behind Red Bull and receives one additional homologation for 2026 and another for 2027. Audi, Ferrari and Honda are more than 4% off and are granted two additional upgrades for 2027, with Audi understood to be saving its next upgrade for that season. All four manufacturers also receive corresponding cost cap and dyno testing increases.

FIA single-seater director Nikolas Tombazis said the team was confident in the findings and that the first year of ADUO had reinforced belief in the concept. Changes to the methodology are being explored for 2027, when new fuel-flow rates also come into effect.