The FIA has approved several last-minute adjustments to the Formula 1 regulations ahead of the 2026 season-opening Australian Grand Prix in Melbourne. Key changes include closing an engine compression ratio loophole and tweaking the qualifying format, though some issues like energy management remain unresolved. These updates aim to address technical controversies and ensure fair competition from the start.
The FIA's decision comes just days before the Australian Grand Prix, set to kick off the 2026 season on March 8 in Melbourne. Central to the changes is a revision to the engine compression ratio rules, which teams suspected Mercedes of exploiting to gain a power advantage. Under the previous regulations, the ratio was measured only at ambient temperature, but rumors suggested Mercedes increased it at operating temperature for a boost.
Mercedes team principal Toto Wolff downplayed the potential gain, calling it a 'low single-digit boost' to horsepower. However, Red Bull's Max Verstappen indicated his team believed it could be worth up to 10 times that amount. The new rule requires measurement at both ambient temperature and 130°C, effective from June 1, 2026, between the Canadian and Monaco Grands Prix. This change passed unanimously among the five engine manufacturers, including Mercedes, allowing modifications to locked-in designs.
The FIA stated: 'A significant effort has been invested in finding a solution to the topic of the compression ratio... This parameter... is limited in the regulations to 16:1, measured in cold conditions.' The update prevents rivals from countering with higher cold ratios, as compression naturally decreases with heat.
Qualifying sessions will also see modifications due to the expanded 22-car grid. Q1 and Q2 will eliminate six cars each, up from five, while Q3 extends to 13 minutes with a shortened pre-session break to maintain overall time. For active bodywork, straight mode—where front and rear wings adjust to reduce drag on straights—can only be re-enabled in qualifying if five minutes remain, ensuring fairness in low-grip conditions.
Other adjustments include scrapping Monaco's mandatory two-tyre-change rule after last year's trial failed to improve overtaking, and making cool suits optional during heat hazards, though cars must carry the system. Unresolved matters include energy management techniques like super-clipping and race start procedures, with McLaren's Andrea Stella raising safety concerns over stalling risks. Ferrari's Fred Vasseur has opposed changes that could negate their responsive power unit design. The FIA noted ongoing evaluations, emphasizing collective learnings from pre-season testing.
These tweaks reflect the challenges of the 2026 regulations, which introduce new hybrid engines with equal power splits from combustion and electrical sources, active aerodynamics, and sustainable fuels. Drivers like Lewis Hamilton have noted improved handling in lighter cars, though lap times may be 1-2 seconds slower initially.
