New FIA ADUO framework could transform Formula 1’s engine development race
Formula 1’s upcoming ADUO mechanism is already generating intense discussion across the paddock, even before the FIA has officially published its final findings. While the system was designed to prevent large performance gaps between manufacturers under the next generation of power unit regulations, the first reported evaluations suggest some teams could gain a significant competitive boost while others may find themselves restricted despite leading the field.
The latest information emerging from the paddock indicates that Red Bull-Ford Powertrains has established itself as the benchmark for internal combustion engine performance. This development is particularly noteworthy given that many expected Mercedes to occupy the top position based on its long-standing reputation as Formula 1’s hybrid power unit reference.
Instead, the FIA’s preliminary analysis appears to place Red Bull-Ford at the top of the rankings, creating a very different competitive picture heading into the new regulatory era.
How the ADUO system works
The Additional Development and Upgrade Opportunities, commonly known as ADUO, were introduced to help manufacturers that fall behind the performance benchmark during the early years of Formula 1’s new engine regulations.
The concept is relatively straightforward. The FIA measures the performance gap between each power unit supplier and the benchmark engine. Depending on the size of that deficit, manufacturers become eligible for additional development freedoms designed to help close the gap more quickly.
The system currently operates around two performance thresholds.
The first activation level applies when a manufacturer is found to be between two and four percent behind the benchmark. In this scenario, the supplier receives one additional power unit upgrade opportunity during the current season and another during the following year.
The second and most generous tier applies when the performance deficit exceeds four percent. Manufacturers in this category are entitled to two additional upgrades in the current season and two more in the following campaign, providing a substantial opportunity to accelerate development.
Beyond technical upgrades, the ADUO package also includes additional financial flexibility and expanded testing resources, making it one of the most influential mechanisms within the new regulations.
Red Bull-Ford leads the rankings but receives no support
Ironically, being the benchmark comes with its own disadvantage.
Because Red Bull-Ford is reportedly the reference power unit used by the FIA for comparison purposes, the manufacturer receives no ADUO assistance. The company is effectively excluded from the system’s benefits and must continue developing within the standard regulatory limits. While leading the field is obviously a desirable position, it also means Red Bull-Ford will not have access to any additional upgrade opportunities should rival manufacturers rapidly close the gap through ADUO support.
This is one of the reasons why the FIA’s methodology has already become a subject of debate among several teams.
Mercedes qualifies for limited assistance
One of the biggest surprises from the reported analysis concerns Mercedes.
Despite powering one of Formula 1’s strongest teams and remaining one of the most respected engine manufacturers in the sport, Mercedes is believed to fall into the two-to-four percent deficit category. If confirmed, this would allow Mercedes to introduce one extra power unit upgrade during the current cycle and another in 2027. In addition, the German manufacturer would reportedly gain financial assistance estimated at approximately three million dollars.
The benefits would extend beyond the factory team, potentially helping customer operations McLaren, Williams and Alpine, all of which rely on Mercedes power units.
Ferrari, Honda and Audi emerge as the biggest ADUO beneficiaries
The largest gains, however, appear set to go to Ferrari, Honda and Audi. According to current estimates, all three manufacturers fall into the category exceeding a four percent performance deficit relative to the benchmark. This places them in the highest level of ADUO support available under the regulations.
For Ferrari, this could represent a major strategic opportunity. The Maranello-based manufacturer would be eligible for two additional engine upgrades during the current cycle and another two in 2027, creating greater flexibility to improve performance and reliability.
The financial benefits are equally significant. Reports indicate that manufacturers in this category could receive between 4.5 and 6 million dollars in additional support, together with more than 100 extra hours of dyno and simulation development time.
Those advantages would not only benefit Ferrari itself but also customer teams powered by Ferrari engines, including Haas and Cadillac. Similarly, Aston Martin could gain from Honda’s allocation, while Audi would enjoy the full package as it prepares for its long-awaited Formula 1 entry.
Awaiting official FIA confirmation
Although these figures remain based on preliminary information rather than an official FIA publication, they already provide a fascinating glimpse into how the ADUO framework could influence the competitive order in Formula 1.
For Ferrari, the reported outcome offers a potentially valuable pathway to accelerate power unit development. For Red Bull-Ford, it creates the unusual situation of being rewarded for success with stricter limitations than many of its rivals.
With teams continuing to analyse the FIA’s methodology and some manufacturers reportedly questioning the evaluation criteria, further developments are expected in the coming days. Until the governing body formally confirms the results, the ADUO story remains one of the most important and closely watched topics shaping Formula 1’s future engine landscape.
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