What is ADUO and why is it an enormous opportunity for F1 teams?

The FIA is set to announce within the coming days which power unit suppliers will receive a boost under the ADUO programme, and for those manufacturers and the teams that rely on their power unit, it could prove to be a significant lifeline in what is shaping up to be one of the most fiercely contested development battles in recent memory.

ADUO stands for Additional Development and Upgrade Opportunities. It is a programme enshrined in the sporting regulations covering the 2026 to 2030 era, with one overarching purpose: to prevent any single power unit supplier from establishing the kind of years-long stranglehold that Mercedes enjoyed in the early days of the turbo-hybrid formula from 2014 onwards.

How does ADUO actually work?

The FIA measures the performance of each internal combustion engine (ICE) — which is essentially half the power unit — using a dedicated performance index, assessed after a set number of rounds.

In this instance, the measurement window falls between the Canadian Grand Prix and the Monaco Grand Prix. Any manufacturer whose ICE registers a performance deficit of two per cent or more compared to the benchmark unit becomes eligible for additional development opportunities and an uplift to their cost cap allocation.

The specifics are worth understanding. A deficit of between two and four per cent earns a manufacturer one additional upgrade to a specified power unit component during the current season, plus a further upgrade in the following year if the gap persists, along with up to three million dollars of additional cost cap headroom.

Should the deficit exceed four per cent, the entitlements become considerably more generous: two extra upgrades per season and between 4.65 million and 11 million dollars of additional budget, scaled according to the size of the shortfall.

It is also worth stressing that ADUO is not a Balance of Performance (BoP) mechanism, like the one seen in the World Endurance Championship (WEC); as manufacturers are given the space to find performance themselves, but must do so through their own means. Nothing is artificially equalised like through a BoP.

View the additional development opportunities that ADUO offers to suppliers below.

Where do the manufacturers stand?

After five rounds of the 2026 season, a clear hierarchy has begun to emerge at the top of the constructors' standings.

Mercedes has won every grand prix so far, accumulating 219 points in the process. Ferrari trails by 71 points, with McLaren and Red Bull sitting further back still. 

The gap between Ferrari and Mercedes is widely attributed, at least in part, to a meaningful difference in outright power unit performance between that of Mercedes HPP and the Scuderia.

For Ferrari, ADUO represents a potential avenue to close that pace gap. Mercedes is broadly considered the benchmark in terms of raw ICE performance, with Red Bull Powertrains-Ford sitting surprisingly close behind.

Honda, meanwhile, appears to carry a deficit significant enough to qualify comfortably for multiple upgrade opportunities.

The picture for Ferrari and Audi is considerably more uncertain. Around a month ago, a number of data analysts circulated projections on social media suggesting that both manufacturers could be carrying a deficit of more than four per cent relative to Mercedes.

Those estimates have since been revised downwards, and both suppliers are now thought to sit in a grey area, hovering close to the two per cent threshold without clearly falling on either side of it.

The distinction matters enormously: the difference between a deficit of just above or just below two per cent is the difference between receiving ADUO assistance and receiving nothing at all.

What could it mean in practice?

Should the FIA determine that Ferrari's ICE falls sufficiently short of Mercedes' standard, the Italian team would gain the opportunity to develop a specific power unit component outside of the normal restrictions.

In a competitive landscape where the margins between teams appear to have tightened since the Miami Grand Prix, even a modest power gain could carry significant consequences.

A handful of additional horsepower can translate to a lap time improvement of one or two tenths of a second. During the Canadian Grand Prix, it was plain to see that gains of that magnitude could swing a result by two or even three positions.

If the field continues to compress in the races ahead, the positional benefit of an ADUO upgrade could be even greater.

Critically, any upgrade Ferrari receives does not apply to the Scuderia alone. As a power unit supplier, Ferrari is obligated to make the same specification available to its customer teams, Haas and Cadillac.

A stronger Ferrari engine would therefore hand both Esteban Ocon and Oliver Bearman at Haas, and Sergio Perez and Valtteri Bottas at Cadillac, the same performance uplift as they battle for position in a congested midfield.

The same logic applies to Audi, which enjoyed an encouraging start to their maiden F1 season with points in Australia before its form dipped somewhat in subsequent rounds.

An ICE upgrade could represent the difference between ninth in the constructors' championship and, in the most optimistic scenario, fifth.

All of this, however, remains hypothetical until the FIA confirms its findings. In Maranello and Ingolstadt, the wait for the governing body's verdict will not be without a degree of nervous anticipation.