The Fédération Internationale de l'Automobile (FIA) has officially announced that Mercedes has been granted the right to introduce upgrades to its power unit, despite strong objections from rival teams, most notably Red Bull. This decision forms part of the Additional Development and Upgrade Opportunities (ADUO) framework that the sport's governing body introduced alongside the rollout of brand‑new engines for the 2026 season. The ADUO system was designed to give manufacturers a structured pathway to close any performance gap that may emerge during the multi‑year regulatory cycle, allowing them to apply for extra homologations if they fall behind the leading power unit.
In June, after the first five races of the 2024 campaign, the FIA completed its initial performance assessment. The analysis identified Red Bull as possessing the strongest engine package at that stage, while Mercedes, Ferrari, Audi and Honda were judged to be trailing by a margin that fell within the two‑to‑four‑percent window defined by the ADUO rules. As a result, those four manufacturers were each awarded one additional homologation for the 2026 season and a further one for 2027, together with a modest increase in their allotted cost‑cap and dyno‑testing allowances.
Although the FIA did not publish the detailed findings, the information was corroborated by team personnel, driver comments and a leaked internal document. The ruling sparked controversy across the paddock. Mercedes, whose works team had dominated the early part of the season by winning the first six Grands Prix, appeared to receive a technical boon, while Red Bull—despite only managing a single podium finish in the same period—seemed to be left without any extra development allowance.
Red Bull driver Max Verstappen publicly criticised the decision, arguing that it unfairly penalised a team that had already demonstrated superior performance. Meanwhile, Mercedes team principal Toto Wolff questioned the transparency of the FIA’s methodology, insisting that his outfit already possessed "the most powerful power unit" and suggesting that the upgrade permission might be unnecessary. After the second assessment period, which concluded with the Hungarian Grand Prix just before the summer hiatus, the FIA released a comprehensive statement confirming the earlier allocations and adding new information. For the second period, the regulator announced that no additional homologations would be granted to any power‑unit manufacturer.
This effectively means that Red Bull’s engine remained within the two‑percent performance window of the top‑performing unit, preserving its status as the benchmark for the season. Had any of the other manufacturers—Mercedes, Ferrari, Audi or Honda—demonstrated a performance jump that eclipsed Red Bull’s after the June review, the British‑based squad could have been offered its own upgrade slot, but that scenario did not materialise.
The current championship standings reflect the impact of these technical dynamics. Mercedes driver Kimi Antonelli leads the drivers’ table, followed by teammate George Russell and Ferrari’s Lewis Hamilton, with a 59‑point advantage over the Italian. Max Verstappen, despite his vocal opposition to the ADUO outcome, trails by 130 points, sitting in sixth place. In the constructors’ championship, Mercedes sit comfortably 87 points ahead of Ferrari, while McLaren—powered by a Mercedes engine—has enjoyed a resurgence, with reigning world champion Lando Norris claiming victory in the two most recent races.
Although Mercedes has been authorised 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, while the remaining upgrades are expected to be deployed later in the year. The FIA’s director of single‑seater racing, Nikolas Tombazis, emphasised that the ADUO review process involved exhaustive data analysis and that the findings from the second period were underpinned by robust statistical evidence.
He also highlighted the need to protect the confidentiality and intellectual property of the teams, noting that the ADUO framework is still in its infancy and may evolve through ongoing dialogue with power‑unit manufacturers. Looking ahead, the third ADUO review window began with the Dutch Grand Prix and will run through to the Mexico City Grand Prix on November 1. This period will give manufacturers another chance to request additional upgrades if they fall outside the acceptable performance range, ensuring that the competition remains as balanced as possible throughout the remainder of the season. Fans can look forward to the iconic Italian Grand Prix at Monza, Ferrari’s home race, scheduled for September 4‑6, which will be broadcast live on Sky Sports F1.
The evolving technical landscape, combined with the high‑stakes championship battle, promises an exciting climax to a season already marked by regulatory intrigue and on‑track drama.