Mercedes engine controversy: Why the FIA’s delayed ruling has infuriated Ferrari
The FIA has reportedly made a final decision regarding the alleged legality of the Mercedes power unit, and the way it was handled has raised some eyebrows. Here’s what came out of the team meetings.
For several months now, discussions have been ongoing about the supposed legality of Mercedes’ power unit, with the Brackley team reportedly exploiting a gray area in the rules to increase the compression ratio beyond the limit set by regulations. Until recently, it seemed Ferrari, Audi, Honda, and Red Bull were gaining the upper hand, but the FIA’s decision has sparked widespread debate.
On Wednesday, 18 February, engine manufacturers met to discuss the Mercedes power unit issue. The FIA stated that the matter needed to be resolved before the season opener in Australia. However, the decision taken does not fully align with what was indicated just a few days ago. Teams will vote next week, but any regulatory changes won’t come into effect for several months.
The FIA’s official PU decision
The FIA, as highlighted in the official statement, proposed an electronic vote to all engine manufacturers present on the grid to introduce an additional hot-test. The majority of engine suppliers, along with the FIA and FOM, must approve for the vote to pass. While the proposal is likely to succeed, the new test will only be implemented in August, which has generated criticism. In short, Mercedes-powered teams will be able to exploit the gray area in their engine design until the summer break. This has caused frustration, as rules are changing mid-season, particularly problematic at the start of a new regulation cycle. Here’s the official FIA statement:
“In recent weeks and months, the FIA and power unit manufacturers have worked together to develop a methodology to quantify changes in compression ratio from ambient to operational conditions. Following validation of this approach, a proposal was presented whereby, starting 1 August 2026, compliance with the compression ratio limit must be demonstrated not only under ambient conditions but also at an operational temperature of 130°C. The vote has been submitted to power unit manufacturers and the results are expected within the next ten days, to be communicated in due course. As with all regulatory changes in Formula 1, any modifications remain subject to final FIA approval.”
Fred Vasseur’s reaction
Ferrari team principal Frédéric Vasseur expressed his frustration:
“We are not here to protest. We are here to have clear regulations and to ensure that everyone understands the rules in the same way. But this is not about a protest. Not everyone can have the exact same interpretation of the regulations, nor the same as the FIA. So I’m not surprised that these issues arise. But I believe in Mercedes’ good faith. Everyone has their own interpretation and defends their project and team. We’ve been discussing this for months, but it’s a bit embarrassing that, two weeks before the first Grand Prix, we’re still asking for clarifications. It’s not good for performance or the general environment. I believe it’s easier to lower a compression ratio than to increase it. Technically, there are always solutions.”
Electronic votes must be submitted within ten days. The situation is still evolving, and the story is far from over.
This ongoing tension highlights the importance of the 2026 technical reset, where even the smallest deviation in regulatory interpretation can yield a massive performance advantage. While Mercedes appears to have won this round by delaying the stricter testing until August, the pressure from Ferrari and other rivals ensures that every lap until the summer break will be scrutinized under a technical microscope. Whether this compromise maintains the spirit of the new era or simply kicks a deeper problem down the road remains a central question for the season ahead.
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