The future of Red Bull's Formula 1 engine development remains uncertain. The FIA is expected to announce the outcome of its second round of analysis regarding the Additional Development and Upgrade Opportunities (ADUO) before the Italian Grand Prix, a decision that could shape the team's remaining season.
The governing body is set to release its findings this week, covering the period from the Monaco Grand Prix to the Hungarian Grand Prix. This review determines whether manufacturers are allowed extra development time, spending, or the ability to introduce new engine specifications.
In the first ADUO period, spanning the Australian to Canadian Grands Prix, Red Bull was identified as the benchmark engine, being more than 2% ahead of all rivals. As a result, the team was denied any additional development opportunities, including the introduction of a new specification.

Red Bull disputed this decision and requested a review of the data. However, according to The-Race, the review found no evidence to change the FIA's initial verdict, although the official outcome has not been publicly disclosed.
The second ADUO period has now concluded, and the FIA must notify manufacturers of the results within a specific window, which expires before the Italian GP. This makes an imminent announcement likely.
The outcome is critical for Red Bull's plans. If they are deemed to be more than 2% behind their closest rival, they could gain development opportunities and potentially introduce an upgrade before year-end. Conversely, if they remain ahead or within 2% of Mercedes, the door will be shut.
If denied again, Red Bull's final chance comes in the third ADUO period, running from the Dutch GP to the United States GP, which will be the last window before the regulations reset for 2027.
The ADUO system has been controversial because rankings are based solely on the internal combustion engine (ICE) performance, not the overall power unit. In this area, Red Bull is believed to be highly competitive, even though Mercedes is widely considered to have the best overall package.



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