How F1's Engine Dispute Could Transform the 2026 Season
Dec.23 - The 2026 power unit controversy has intensified amid claims that Mercedes is not alone in exploiting a potential loophole, but may still emerge as the biggest beneficiary.
According to Italy's Corriere dello Sport, Red Bull Powertrains has also been attempting to reproduce the same system that allegedly allows Mercedes engines to reach an effective compression ratio close to 18:1 under running conditions, despite the regulatory limit of 16:1.
"Seven months ago, a Mercedes engineer hired by Red Bull Powertrains shared this secret. Red Bull has since tried to reproduce this system," the newspaper reports.
However, it adds that the task has proven far from straightforward. Mercedes is said to have been working on the concept for more than a year and has built up a significant lead, while Red Bull has so far failed to replicate the same effect in the real world.
"Red Bull have not yet managed to get close to an 18:1 compression ratio while driving. Mercedes has achieved this," Corriere dello Sport claims.
If the interpretation is upheld, the advantage would extend beyond Mercedes works cars to all customer teams using the German manufacturer's power unit in 2026, including McLaren, Williams and new customer Alpine.
A central problem, according to the Italian daily, is enforcement. The regulations specify that compression ratio checks are carried out at room temperature, creating a grey area once engines reach operating temperatures.
"The manufacturers who ask the FIA for clarification indicate that the cars must always comply with the rules. However, it is difficult to prove this, even after a protest," the report states.
Corriere dello Sport says the regulations themselves leave space for "this trick".
"It is specifically stated in the regulations that the check is carried out at room temperature. This indirectly leaves room for free interpretations, and this was not the case with the old regulations."
With eight Mercedes-powered cars potentially enjoying a power advantage, concern among rival manufacturers is growing.
"The teams try to solve these kinds of problems through weekly meetings. The concern now is that the eight cars with Mercedes engines will have more power," the report adds.
The FIA is now described as facing a major dilemma. Outlawing the system could severely handicap Mercedes, which is believed to have designed its 2026 power unit around the concept. Allowing it, however, risks triggering protests and political fallout once the season begins.
According to Corriere dello Sport, a compromise is being discussed - permitting Mercedes to use the system in 2026 only, provided it formally commits to abandoning it for 2027. Such a solution would likely allow Mercedes-powered teams to benefit for one season, a prospect that has already drawn strong opposition from rivals.
12 F1 Fan comments on “How F1's Engine Dispute Could Transform the 2026 Season”
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we should have something to fight at each race to keep viewers on tv seat.
Does it specify the location of the room and the time of day or the water content of the atmosphere?Fortunately Ferrari being Italian have a lot of hot air at their disposal.
i believe the rule says its with a cold engine it must be X, so based on that , Rb havnt broken "The rule as its written"
George for '26
instead of big race event, we could try to separate F1 into multi-task or problem-solve.
I'm still awaiting a possible explanation of how the compression ratio can be changed so much by heat. Afterall a lot of people are now in the know.
maybe, we could use an air duster instead of a turbo to increase compression.
instead of FIA showboating, we should have a real racing serie with carbon free, collective law, new fuel, female driving.
Yeah, great, maybe we can also let them drive with solar panels instead of carbon wings.
It'd be great to have a series without all these technical rules, just rules around safety of the driver.
Let the engineers come up with their own engines, aerodynamics etc. without all the stupid weight, height, etc. restrictions. See what sort of cars people could come up with, with only restrictions on how long certain parts must last and safety items.
Too many rules.
Whatever rules are put in place, every team is going to look for ways to build a better car/engine within those rules. This is what F1 is supposed to be about - a technology race, as well as the contest between drivers.
It is actually no different in any sport. Teams are always looking for competitive advantage within the scope of the rules.
The 2026 rules have been in place for more than a year. Just stand back and see what teams make the best job of them.
Donut Lab has produced a battery that changes everything.
If true I can't see how F1 can avoid going fully electric.
Had to happen.
Internal combustion could be just for noise - 10cc plus a subwoofer.