The ADUO process, the mechanism designed to help engine manufacturers that are lagging behind by granting them additional development resources, is rapidly approaching a crucial stage.
Based on the information that has emerged in recent weeks and is now widely known within the Formula 1 paddock, Mercedes and Red Bull Powertrains currently represent the benchmark among power-unit manufacturers. Ferrari, Audi and Honda, meanwhile, are understood to be trailing the leaders to varying degrees.
Mercedes and Red Bull remain the reference point
While the FIA’s performance data reportedly paints a clear picture regarding Audi and Honda, Ferrari’s position appears far more complicated. Honda is believed to be well beyond the 4% performance gap threshold outlined in the regulations, while Audi also falls within the range that would qualify for ADUO support.
Ferrari, however, finds itself in a borderline situation. According to the data collected by FIA monitoring systems, the Italian manufacturer is operating right on the edge of the criteria used to determine eligibility. Measurements taken downstream of the internal combustion engine, combined with sensors monitoring electric motor output, reportedly place Ferrari very close to the limit for ADUO application.
This uncertainty has made Ferrari one of the most closely watched manufacturers as the FIA finalizes its assessment of power-unit performance ahead of the next phase of development concessions.
Ferrari prepares upgrades as the ADUO debate continues
Mercedes and Red Bull are understood to be firmly opposed to the introduction of additional advantages for rival manufacturers, while the FIA remains committed to bringing all power-unit suppliers closer to a competitive performance level.
Reports suggest that Ferrari has already prepared its first engine evolution package, with the upgrade expected to be introduced at the Belgian Grand Prix in July if the ADUO framework is applied as anticipated.
Further clarity could emerge from the Monaco Grand Prix onward, when new monitoring procedures related to hot compression-ratio checks are scheduled to come into force. Although the impact of this measure is expected to be relatively small, it could contribute to a more balanced competitive landscape during the second half of the season.
The next stage of the ADUO process, which is expected to become increasingly influential from mid-season onward, should provide a clearer picture of the true performance hierarchy among Formula 1’s engine manufacturers.
That is, of course, assuming the sport does not move forward with the proposed 2027 power-unit revisions currently under discussion. Those changes could once again reshape the competitive order and potentially force manufacturers to rethink their development strategies, creating yet another chapter in Formula 1’s ongoing engine debate.
