Ferrari has fully acknowledged that it needs to close a significant and clearly measurable performance gap to Mercedes, a deficit that is at least partially linked to the internal combustion engine and overall power unit efficiency. In order to recover lost ground and become more competitive over both qualifying laps and race distance, the Maranello-based team is placing considerable hope in qualifying for the ADUO, the newly introduced mechanism designed to grant additional development opportunities to power unit manufacturers that are currently trailing behind their direct rivals. At this stage, the Scuderia is patiently waiting for the FIA’s official measurements and assessments, which will ultimately determine not only its eligibility for these extra upgrades but also any potential cost cap relief and additional dyno testing hours that could prove crucial over the course of the season.
Ferrari team principal Frédéric Vasseur first publicly referred to the ADUO mechanism in the aftermath of the Chinese Grand Prix, openly recognizing the clear engine advantage currently enjoyed by Mercedes. At the same time, the French manager expressed some skepticism that the newly introduced hot tests on compression ratios would have a decisive impact on the competitive order. In his view, those regulatory tweaks alone are unlikely to significantly alter the existing hierarchy. Instead, Frédéric Vasseur suggested that the introduction and activation of the ADUO system could represent a far more meaningful and concrete opportunity for Ferrari to progressively reduce the performance gap to Mercedes over time.
The ADUO, which stands for Additional Development and Upgrades Opportunities, is an entirely new and rather complex procedure introduced by the FIA under the latest generation of Formula 1 power unit regulations. The system revolves around the calculation of a specific performance index that focuses exclusively on the internal combustion engine, deliberately isolating it from the hybrid components. This index is derived from data collected directly on track, using highly precise torque sensors mounted on the driveshafts of each car. Although the full methodology is outlined in an official FIA document that is not publicly accessible, it is widely understood that the calculation is largely based on peak and sustained power output levels.
Measurements are not taken on a race-by-race basis but are instead evaluated over defined periods consisting of six Grands Prix each. Within each of these intervals, the FIA considers the highest performance value recorded by each manufacturer as the reference point for comparison. This approach ensures that occasional anomalies or external factors do not overly influence the final assessment, providing a more balanced and representative picture of each engine’s true performance potential.
Ferrari’s chances of benefiting from the additional development allowances provided by the ADUO will therefore depend entirely on the gap measured relative to Mercedes, which currently sets the benchmark in terms of engine performance. The system is structured around two main thresholds: the first is triggered when a manufacturer is more than 2% behind the leading engine, while the second applies when the gap exceeds 4%. In practical terms, these percentages correspond roughly to a deficit of between 10 and 20 horsepower, a margin that can have a significant impact on lap times, especially on power-sensitive circuits.
If these thresholds are met, Ferrari, along with any other eligible manufacturers, would gain access to a range of important concessions. These include partial exemptions from the strict cost cap regulations applied to power unit development, an increase in the number of hours permitted for dyno testing, and, perhaps most importantly, the possibility to homologate additional engine upgrades beyond those normally allowed under the current regulatory framework.
Looking more closely at the potential upgrade scenarios, if the FIA were to determine that Ferrari’s power unit is lagging between 2% and 4% behind Mercedes, the Italian manufacturer would be permitted to introduce one additional engine update during the 2026 season and a further update in 2027. This second update would come on top of the standard development allocation already предусмотрed by the regulations, effectively giving Ferrari more flexibility to accelerate its progress.
In the event that the gap were found to be even larger, exceeding the 4% threshold, the development opportunities would increase further. In that scenario, the Ferrari engineers and technicians would be allowed to introduce two upgrades during the 2026 campaign and an additional two upgrades in 2027, significantly expanding its ability to respond to the deficit. However, there is an important limitation built into the system: if the performance gap were to be confirmed again during a second measurement period, no further development concessions would be granted beyond those already allocated.
Through the ADUO framework, the Maranello team would have the right to intervene on almost the entire power unit architecture, with only a few relatively minor restrictions in place to maintain overall regulatory stability. According to the current rules, an updated engine could be introduced starting from the seventh race of the season. Following the cancellation of the Bahrain and Jeddah rounds, this reference point now corresponds to the Spanish Grand Prix in Barcelona.
However, some reports suggest that the FIA may still choose to consider the sixth race of the original calendar as the relevant milestone. If that interpretation were adopted, Ferrari could potentially introduce an updated power unit as early as the Canadian Grand Prix, provided that it meets the criteria required to qualify for the ADUO mechanism. In such a case, Ferrari would also be obliged to supply at least one updated engine specification to its customer teams, Haas and Cadillac, ensuring a degree of parity across its partner operations.
Beyond the purely technical aspects, the ADUO system also introduces a degree of financial flexibility within the strict limits imposed by the power unit cost cap, which is currently set at 190 million dollars. If a manufacturer is found to be between 2% and 4% behind the benchmark, it would be allowed to deduct up to 3 million dollars from the expenses counted under the budget cap for each six-race period in which it qualifies for the mechanism. This represents a valuable opportunity to reallocate resources and invest more aggressively in development areas that could yield performance gains.
The level of financial relief increases further if the performance deficit is greater. For a gap between 4% and 6%, the allowable deduction rises to 4.65 million dollars, with even larger allowances available for more substantial deficits. Importantly, manufacturers retain a certain degree of strategic freedom, as they can decide how to distribute these financial benefits between the current season and the following one, depending on their long-term development plans.
A similar logic applies to the limitations on dyno testing hours, which are another critical factor in modern Formula 1 engine development. Under standard conditions, manufacturers are restricted to 710 hours of dyno testing for the 2026 season and 410 hours for 2027. However, teams that qualify for the ADUO can benefit from significant increases in these limits.
For example, a manufacturer with a performance gap between 2% and 4% could gain access to up to 70 additional hours of dyno testing, starting from events like the Canadian Grand Prix in Montreal or the Monaco Grand Prix. If the gap falls within the 4% to 6% range, the additional testing allowance rises to 110 hours, while even larger deficits could unlock up to 150 extra hours. As with the financial adjustments, manufacturers are free to decide how to allocate these extra testing hours across the two seasons, allowing them to tailor their development programs according to their specific needs.
Overall, the ADUO represents a comprehensive and multi-layered support mechanism for manufacturers that find themselves in a chasing position. It provides a combination of technical, financial, and operational tools designed to help close performance gaps in a controlled and regulated manner. Ferrari, aware of the challenges it currently faces against a strong Mercedes package, is clearly determined to take full advantage of every opportunity offered by this system.
However, everything depends on the outcome of the FIA’s measurements and whether Ferrari’s current deficit falls within the thresholds required to activate the ADUO. If it does, the Scuderia will have a valuable chance to accelerate its development trajectory and potentially move closer to the front of the grid. If not, it will need to continue relying on incremental improvements and strategic execution to bridge the gap to its main rival.
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