Formula 1's significant rule changes for the current season, aimed at improving racing, have led to unexpected challenges with the new engine regulations. While the revised aerodynamic rules have been largely well-received, the hybrid power units have drawn criticism for leaving cars energy-starved when the battery depletes.
Drivers report that when the battery is empty, the cars produce approximately 540bhp, a figure lower than that of a Formula 3 car, despite having significantly more grip. This necessitates constant battery charging, which has altered the character of many corners on race tracks, with drivers like Fernando Alonso describing them as "charging stations."
The energy management strategy has also contributed to a phenomenon known as "yo-yo racing," where cars repeatedly swap positions over several laps. However, drivers, including four-time champion Max Verstappen, argue this is an artificial outcome of the power unit limitations, with overtakes often occurring due to sudden, significant power imbalances rather than driver skill or strategic advantage. Verstappen has voiced frustration, stating that the racing is "not really realistic" and that driving on reduced horsepower for F1 standards can be "painful."
These concerns were raised early in the season by drivers such as Verstappen and Alonso, prompting a reaction from the sport's governing bodies. Tweaks to the rules were implemented after just three races, and a modification to the power split is planned for 2028, with an intermediate step for next year, aiming to reduce these issues.
Despite these adjustments, the core problem stems from the removal of the MGU-H, which recovered energy from the turbo and exhaust, and the inability to recover energy from the front axle. The FIA was reportedly warned of this energy starvation issue in the years leading up to the 2026 regulations. This has led to proposals, such as one from FIA president Mohammed Ben Sulayem for a return to naturally aspirated V8 engines by 2031, though this idea has limited support among stakeholders.
Stakeholders are now focused on a more comprehensive analysis of future engine requirements. The goal is to develop a package that balances manufacturer needs, road relevance, environmental concerns, cost-effectiveness, and allows drivers consistent access to full power while facilitating natural overtaking.