The Fédération Internationale de l'Automobile (FIA) has officially announced that Mercedes will be permitted to introduce upgrades to its power unit, a decision that has drawn criticism from rival teams, most notably Red Bull Racing. The ruling comes under the Additional Development and Upgrade Opportunities (ADUO) framework, a mechanism introduced alongside the brand‑new engine formula slated for the 2026 season. ADUO was designed to give manufacturers a structured way to close any performance gaps that may emerge during the life of the regulations, ensuring a more level playing field as the sport evolves.
In June, after the first five Grand Prix of the year had been evaluated, the FIA released a provisional assessment that identified Red Bull as possessing the most powerful engine on the grid. Based on that analysis, the governing body granted extra homologation allowances to Mercedes, Ferrari, Audi and Honda. While the FIA kept the details of its evaluation confidential, the information soon leaked and was corroborated by team personnel and drivers who spoke publicly about the outcome.
The decision proved controversial for several reasons. Mercedes, whose factory team had dominated the opening half of the season by winning the first six races, was now being awarded an upgrade at a time when Red Bull had only managed a solitary podium finish.
Critics argued that this could widen the performance gap rather than narrow it, potentially disadvantaging the reigning champions. Max Verstappen, Red Bull’s lead driver, openly expressed his displeasure, questioning the fairness of the process.
Meanwhile, Mercedes team principal Toto Wolff, who had previously claimed his outfit possessed "the most powerful power unit," raised further concerns about the transparency and methodology of the FIA’s assessment. After a second round of performance reviews—concluding with the Hungarian Grand Prix just before the summer hiatus—the FIA released its final findings for both assessment periods.
The statement clarified that for the first period, Mercedes was found to be within a two‑to‑four‑percent performance window of the leading engine. Consequently, the team earned the right to one additional homologation in 2026 and another in 2027, along with corresponding increases in its cost‑cap allowance and dyno‑testing budget. Audi, Ferrari and Honda, judged to be more than four percent off the pace, each received two extra homologations for both 2026 and 2027, plus similar financial adjustments. The second‑period results were less favourable for Red Bull.
The FIA announced that no further homologations would be granted to any power‑unit manufacturer for the upcoming period. This implies that Red Bull’s engine remained within the two‑percent margin of the best unit on the grid, effectively confirming that it still ranks among the top performers. Had any of the other manufacturers demonstrated a performance leap beyond Red Bull’s after June, the British team could have earned its own upgrade slot, but that did not occur.
Current championship standings underscore the competitive stakes. Mercedes driver Kimi Antonelli leads the drivers’ table, followed by teammate George Russell and Ferrari’s Lewis Hamilton, who sits 59 points behind. Max Verstappen trails by a substantial 130 points, placing him sixth overall.
In the constructors’ championship, Mercedes enjoys an 87‑point advantage over Ferrari, while McLaren—powered by a Mercedes engine—has surged into third place, buoyed by Lando Norris’s recent double‑win streak. Although Mercedes has been authorized to implement its 2026 upgrade since the June announcement, the team has not yet revealed whether it has already done so. Ferrari, Audi and Honda are believed to have each introduced one of their two allotted upgrades for the upcoming season. The FIA’s director of single‑seater racing, Nikolas Tombazis, emphasized that the ADUO review process involved exhaustive data analysis and that the organization is confident in the robustness of its conclusions.
He also highlighted the need to protect the confidentiality and intellectual property of the teams involved, noting that this inaugural year of ADUO will likely see refinements based on feedback from all power‑unit manufacturers. The third ADUO review window commenced at the Dutch Grand Prix and will run through to the Mexico City Grand Prix on November 1. As the season progresses toward its climax, the implications of these upgrade allowances will become clearer, especially as teams continue to develop their power units within the constraints of the new regulations.
Fans can look forward to the upcoming Italian Grand Prix at Monza, Ferrari’s home race, scheduled for September 4‑6, with live coverage on Sky Sports F1. The ongoing dialogue between the FIA, teams, and drivers highlights the delicate balance between technical innovation and sporting fairness that defines modern Formula 1.