Honda F1: the Japanese manufacturer set to have a $19 million boost for their engine

The Japanese company may be allowed up to $19 million of extra development room after the Canadian Grand Prix if its engine deficit is confirmed in the first 2026 review.

The boost won’t fix Aston Martin’s season by itself, but it could give Honda the freedom it needs to improve its new hybrid package.

Struggling Honda F1 project is going to have certain development concessions. The 2026 season was meant to mark a major step forward for Aston Martin. Honda replaced Mercedes as the team’s power-unit supplier in an exclusive works partnership. Instead, the opening races have exposed how painful a bad starting point can be when development is restricted.

Aston Martin’s issues have gone beyond pure pace. The car has suffered from reliability concerns, excessive vibration that was affecting drivers’ health, and poor race execution. The British team had to wait until the fourth race of the season in Miami to see both cars reach the finish line, with Fernando Alonso P15 and Lance Stroll P17 of 18 classified runners.

That is why ADUO is so relevant for Honda. The FIA created the mechanism to stop manufacturers being trapped for years by a weak homologated engine. If Honda is judged more than 10% behind the benchmark, it can receive up to $11 million for the ADUO period and, in 2026 only, anticipate up to $8 million from future cost-cap periods.

The FIA is keen to stress that ADUO is not Balance of Performance. In endurance racing, BoP can change weight, power, or other parameters to equalise cars directly. Formula 1 is not doing that. Nikolas Tombazis, the FIA’s single-seater director, has framed ADUO as cost-cap relief, not a shortcut, saying manufacturers still have to build the best engine within the technical rules.

That distinction matters because rivals will not want a struggling manufacturer to leapfrog the field through regulatory help. Honda would not receive more fuel flow, a special deployment map or any trackside performance gift. It would receive more scope to spend and upgrade. In practical terms, the system gives Honda a chance to work its way back, not a guarantee that Aston Martin will suddenly become competitive.

The measurement is also narrower than total power-unit performance. The FIA will calculate an ICE Performance Index using factors such as torque, engine speed, MGU-K power and lap-time sensitivity, with an algorithm, similar to those in use on online casino platforms to recommend games to their users, extracting the results and putting the ICEs of each manufacturer in its concessions tier. However, the FIA has made clear that the assessment focuses on the internal combustion engine and does not fully represent the whole power unit, where ERS performance remains central.

The Canadian Grand Prix is now the decisive checkpoint because the FIA’s first review period has changed. The original race-one-to-race-six window was disrupted by the cancelled Bahrain and Saudi Arabian Grand Prix. The first period now covers Australia, China, Japan, Miami, and Canada, with results to be communicated no later than two weeks after the Montreal race.

Once the results are communicated, eligible manufacturers will receive a separate notification detailing their allowance, and upgrades can be introduced as early as the following race. For Honda, Canada could decide how much extra freedom the company gets to reshape its 2026 engine campaign.

The scale is progressive. A 2-4% deficit is worth up to $3 million, 4-6% up to $4.65 million, 6-8% up to $6.35 million, and 8-10% up to $8 million. Only a gap of 10% or more opens the door to the maximum package of $19 million in 2026 development support.

Honda may be the clearest case, but Audi is also expected to be in the ADUO conversation. The German manufacturer is in its first season as a full works Formula 1 team and faces the same reality as every newcomer to a major rules reset: simulations and dyno work only reveal so much before the new car has to race. Reports around Audi’s start to 2026 have pointed to drivability issues and slow launches, including turbo-related compromises that cannot be cured instantly.

For Audi, ADUO would be less about rescue. Extra development freedom could help Neuburg and Hinwil shorten the learning curve if FIA data confirms that the power unit sits outside the permitted performance window. Like Honda, though, Audi would still need to convert regulatory permission into usable hardware.

That is the key point for the whole debate. ADUO can create an opportunity, ease financial pressure and open extra homologation routes. It cannot write the engineering solution. Canada should reveal who gets help, but Honda and Audi will still have to prove that the extra freedom can become lap time.