Formula 1 stakeholders agree in principle to rebalance power unit regulations for 2027
Long-term plan confirmed to transition to naturally aspirated V8 engines by 2030 or 2031 to reduce complexity and return control to drivers
Formula 1 stakeholders have agreed in principle to rebalance power unit regulations for the 2027 season, marking a significant shift from the hybrid-focused rules introduced in 2026. The adjustment aims to address persistent issues regarding speed differentials and battery capacity that have impacted on-track performance and safety. Under the new proposal, the V6 turbo engine power will increase by 50 kW, while the electric motor output will decrease by the same amount.
This rebalancing of the power split is designed to ensure the V6 generates 450 kW, with the motor-generator unit providing 300 kW. The increase in combustion power will be achieved by raising the engine's fuel flow, allowing cars to maintain a higher state of charge throughout a lap. Consequently, if super clipping is required to recharge the battery, there will be more power available to keep the car driving, thereby reducing dangerous speed differentials between vehicles.
The decision comes after concerns regarding the 2026 regulations were validated at the Japanese Grand Prix in March. Early warnings about small battery capacities failing to sustain the powerful electric motor for most of a lap proved correct, leading to limited regenerative braking and restricted energy recovery to the rear axle only. These constraints, combined with the inability to deploy front electric motors, created track conditions where cars could not follow each other closely through corners.
While the 2027 changes are set, discussions are ongoing regarding further technical adjustments. There is potential for the electric motor's harvesting capacity to increase above 350 kW, and battery capacity is under consideration for an increase from 4 MJ to 5 MJ. However, implementing these changes will likely necessitate chassis redesigns to accommodate larger fuel tanks or battery packs, which could impact teams' cost caps and resource allocation.
Looking further ahead, FIA President Mohammed Ben Sulayem has confirmed a long-term plan to transition to naturally aspirated V8 engines by 2030 or 2031, pending manufacturer approval. This move aims to reduce technical complexity and return greater control to drivers compared to the current highly computerised hybrid systems. The shift from previously discussed V10s to V8s aligns better with the broader auto industry while retaining a very minor level of electrification.
The proposed changes reflect a proactive approach by the FIA, teams, power unit manufacturers, and F1 Management to resolve the challenges posed by the current hybrid architecture. While the sport successfully attracted new OEMs like Audi with the near 50:50 split between electric and combustion power, the practical application has required a recalibration to ensure competitive balance and driver engagement.
