No further F1 engine upgrades granted after final 2026 review

The FIA has confirmed that no further engine upgrade opportunities will be granted to Formula 1's power unit manufacturers after the third and final review period of the 2026 season. The Additional Development and Upgrade Opportunities (ADUO) mechanism was introduced with the new power units to allow less performant engines to be improved. The governing body said the gaps to the strongest engine had evolved between rounds 12 and 18, but not to a degree that would trigger additional upgrades.

After the first review period, Red Bull were judged to have the best performing engine, with Mercedes granted one upgrade for 2026 and another for 2027, while Ferrari, Audi and Honda received two upgrade opportunities for each season. The second period also produced no new homologations. The FIA said that, due to the confidential nature of the data, no further details on power unit performance measurements would be released.

The ADUO measurements cover only the internal combustion engine, which is one element of the power unit. Mercedes completed a title double in Brazil, securing the Constructors' Championship a week after Kimi Antonelli had clinched the drivers' title.