Formula 1 agree engine rule changes for 2027 and 2028 season in move away from 50-50 power source

Formula 1 has officially agreed to changes in engine regulations for the 2027 and 2028 seasons, moving away from the current 50-50 split between internal combustion and electrical recovery system power. For 2027, the split will shift to 58/42 in favour of internal combustion, increasing further to 60/40 in 2028. The announcement was made on June 10, 2026, marking a significant shift in the hybrid power unit rules introduced for the 2026 season.