The FIA’s latest proposal to close a potential loophole in the 2026 Formula 1 engine regulations could represent more than just a technical correction—it may also give Ferrari a notable political victory over their rivals, particularly Mercedes.
For months, Ferrari has been pressing the FIA to scrutinize Mercedes’ new 2026 V6 power unit, amid concerns shared by Audi and Honda. These manufacturers have long suspected that the Silver Arrows could be operating their internal combustion engine at a variable compression rate, increasing from the regulatory 16:1 up to 18:1 while the car is running. The FIA had originally capped the compression ratio at 16:1 as part of the new 2026 rules, but Mercedes’ engine passed pre-season checks under ambient conditions without issue.
Following the initial approvals, the FIA is now proposing additional testing procedures to be conducted under higher temperatures to ensure compliance. Discussions held with all F1 engine manufacturers during the Bahrain test week have led the FIA to propose a formal vote to introduce extra compression rate tests at 130°C. If ratified by the World Motorsport Council, these new tests would officially come into effect from August 1, 2026.
Ferrari could gain a major political edge if the FIA enforces cost cap consequences
As one of the teams that most strongly opposed Mercedes’ alleged exploitation of the rules, Ferrari stands to celebrate if the FIA implements these new hot-weather engine tests. Italian media have highlighted that the Scuderia would regard it as an even bigger victory if any modifications Mercedes is forced to make to their V6 internal combustion engine (ICE) to pass the revised compression tests are required to be included within their 2026 cost cap calculations.
Currently, the FIA has not confirmed whether such compliance-related upgrades would count against Mercedes’ budget under the 2026 cost cap. This leaves the door open for potential debates and disputes later in the season. A ruling that forces Mercedes to absorb these costs could shift both the technical and political balance in Formula 1, providing Ferrari with a tangible advantage in managing R&D and development spending.
The 2026 F1 cost cap and its implications for engine development
Formula 1 introduced the cost cap in 2021 to control team spending, initially set at $175 million (£129m) per season before the Covid-19 pandemic. Adjustments over the years saw the budget reduced to $145 million (£107m) in 2021 and $135 million (£100m) in 2023, with incremental increases for races beyond a 21-event calendar. By 2024, the cap was adjusted to $165 million (£122m) to account for inflation and other operational factors.
With the sweeping 2026 regulatory overhaul—including new engine, chassis, and aerodynamic rules—the cost cap has been raised to $215 million (£159m) to accommodate increased R&D expenditures. Mercedes, however, may hope that any future modifications required to pass the new compression tests are excluded from the cost cap, a move that Ferrari and other teams would likely challenge.
Currently, F1 regulations allow teams to exclude certain costs from their budget calculations, such as driver salaries, wages of the top three highest-paid employees, travel, marketing and hospitality expenses, entry and license fees, employee bonuses, and sick pay. Any ruling that forces Mercedes to include compliance-driven engine modifications within the cap could materially impact their overall spending strategy and provide Ferrari with a strategic advantage both on and off the track.
With the FIA expected to finalize its decision in the coming months, the Scuderia’s political maneuvering may prove just as important as their on-track performance. Ferrari’s push for stricter compliance testing underscores the interplay between technical regulations and team strategy, highlighting the evolving chess game behind the 2026 F1 season.
