George Russell: Mercedes Won't Be Hampered by New F1 ADUO Engine Rule

George Russell is confident Mercedes will not be disadvantaged by Formula 1’s new ADUO (Additional Development and Upgrade Opportunities) system, introduced this year to help struggling power unit manufacturers catch up during the first season of the latest technical cycle.

The system measures each manufacturer’s performance against a benchmark and allocates additional development allowances accordingly. With Honda’s initial power unit performance falling short of expectations, the Japanese manufacturer is expected to receive a significant boost in dyno time and upgrade opportunities.

Why it matters:

After years of Mercedes dominating the hybrid era, the new engine rules for 2026 were seen as a potential reset. The ADUO system is designed to prevent any single manufacturer from running away with the championship, but it also risks artificially leveling the field. Russell’s confidence signals that Mercedes believes its engineering depth — not just raw resources — will keep it ahead.

The details:

• The ADUO system mirrors the existing ATR (Aerodynamic Testing Restrictions) in the chassis department, which allocates more wind tunnel time to teams lower in the constructors’ standings.
• Russell argued that ATR has not upset the natural order: the strongest engineering teams still come out on top. He expects the same for engine development.
• “It still proves that the team with the brightest engineers and the best way of working still come out on top,” Russell told media including RacingNews365.
• Mercedes team principal Toto Wolff has publicly questioned the system, warning it should not be used as a tool to deliberately reshuffle the pecking order.
• Russell, however, sees no major disruption: “I still believe in the team and I still believe it’s not going to help us. But I don’t think it’s going to hurt things or change things too drastically.”

What’s next:

As the 2026 season unfolds, early performance data will determine how much extra development each manufacturer receives. While Honda looks set to benefit most, the true test will come mid-season when upgraded power units are introduced. If Mercedes’ early advantage holds, Russell’s prediction will prove prescient — but if Honda closes the gap quickly, the ADUO system may have a bigger impact than he expects.