Formula 1 has agreed on a series of engine regulation changes for the 2027 and 2028 seasons following growing concerns from drivers and teams about the sport’s increasing dependence on electrical energy.
The FIA announced that the current power balance between internal combustion engines and electric systems will be adjusted over the next two years. The existing split, which stands at roughly 53% combustion power and 47% electric power, will move to 58-42 in 2027 before shifting further to 60-40 in favour of combustion engines in 2028. The package still requires formal approval from the FIA World Motor Sport Council later this month.
The changes are designed to address widespread criticism from drivers, who have argued that the current regulations place too much emphasis on energy management rather than outright racing. Several competitors have complained that the need to constantly monitor battery usage has made races feel less natural and, in some situations, created safety concerns because of significant speed differences between cars.
To support the revised power balance, fuel flow rates will also increase. The FIA plans a 5% rise in fuel flow for 2027 and a 13% increase in 2028. At the same time, maximum output from the internal combustion engine will grow from 400kW to 420kW in 2027 and then to 450kW the following year. The goal is to allow drivers to push harder, particularly during qualifying sessions, with less need to conserve electrical energy.
The agreement follows months of discussions involving Formula 1 teams, engine manufacturers, the FIA and Formula One Management. While some manufacturers had concerns about moving too quickly away from the hybrid-focused regulations introduced for 2026, a compromise was eventually reached. The phased approach is intended to improve racing while maintaining the sport’s commitment to innovation and sustainability.
FIA president Mohammed Ben Sulayem said Formula 1 must continue evolving to meet new challenges while delivering exciting competition and supporting long-term technological development. The governing body believes the revised package strikes a balance between performance, sustainability and entertainment.
The proposals are expected to be presented for final approval at the World Motor Sport Council meeting on 23 June. If ratified, the changes will become part of Formula 1’s engine regulations from the 2027 season onward.