FIA grants no F1 engine maker extra homologations in third ADUO review

The FIA’s third 2026 ADUO assessment has awarded no engine manufacturer extra homologations. Performance gaps to the leading internal-combustion engine shifted slightly during the review period, but not enough to change the development opportunities available.

The review covered races 12 to 18, with the United States Grand Prix closing the period. Red Bull Ford Powertrains remained the reference in the published ADUO classification. Exact performance margins are confidential; an earlier published breakdown placed Mercedes, Ferrari, Audi and Honda behind that benchmark, while Red Bull fell outside the categories eligible for extra development opportunities.

Introduced in 2026 to narrow differences among engine suppliers, ADUO allows manufacturers at least 2% behind the leading combustion engine to claim additional development opportunities. In the first review, after the Canadian Grand Prix, Mercedes—2% to 4% behind—received one extra homologation for each of 2026 and 2027. Audi, Ferrari and Honda, each more than 4% behind, received two for each year, as well as additional room under the cost cap and extra dyno hours.

The second review, after the Hungarian Grand Prix, awarded no additional homologations. The third assessment has produced the same result.