Honda clarifies FIA stance amid compression‑ratio controversy

Honda has laid out its position on the FIA’s handling of the compression‑ratio dispute that pits Mercedes (and possibly Red Bull) against the 2026 power‑unit rules. The alleged 18:1 ratio, above the 16:1 limit measured only in the pit lane, could shave roughly 0.3 seconds per lap at Albert Park – a 17‑second gain over a full race. Honda says it will consult the FIA to keep its upcoming Aston Martin engine within the rule book.

Why it matters:

• A higher on‑track compression ratio would effectively bypass the 2026 cost‑cap intent, reshaping the performance hierarchy.

The details:

• Allegations – Mercedes High Performance Powertrains, and possibly Red Bull Powertrains, are testing a system that can reach 18:1 on‑track, while the rule caps the ratio at 16:1 when measured in the pit lane at ambient temperature.
• Measurement gap – Current FIA tools only verify compression while the car is stationary; no on‑track sensor exists to confirm compliance during a race.

What's next:

• Jan 22 meeting – The FIA and all power‑unit manufacturers will decide whether on‑track compression‑ratio monitoring is required before the 2026 season.
• Honda’s approach – Honda will keep developing its 2026 quasi‑works engine with Aston Martin while maintaining close dialogue with the FIA to avoid future compliance disputes.