F1 agrees two-step engine rule overhaul amid driver concerns

Formula 1 has agreed a two-step plan to modify engine regulations following criticism of this season’s new power unit design.

Drivers have raised concerns about the near 50-50 split between internal combustion and electrical power, arguing that heavy energy management has reduced the intensity of qualifying.

Four-time world champion Max Verstappen was particularly outspoken, saying he would quit F1 if changes were not made, although all drivers agreed the issue needed to be addressed.

Under the compromise agreed by engine suppliers, the balance will shift gradually towards the internal combustion engine.

The split will move to 58-42 in 2027 before reaching 60-40 in 2028.

In a statement from governing body the FIA agreed to engine rule changes aimed at improving flat-out qualifying while preserving the excitement of racing.

"The proposed changes are intended to address issues related to energy management and fuel energy-flow characteristics and make qualifying more flat-out while not impacting the positive and exciting racing generated by the new regulations," FIA said.

The adjustment will be achieved by increasing fuel flow to the ICE by 5% in 2027 and 13% in 2028, raising combustion power from around 400kW (536bhp) this year to 450kW (603bhp) by 2028.

Electrical output will drop from 350kW to 300kW, although overtaking mode power will remain unchanged.

Maximum energy recovery rates will also rise to improve deployment efficiency.

The FIA has also assessed engine performance rankings, with Red Bull believed to have the strongest unit.

Mercedes have been granted two upgrade opportunities, while Ferrari, Audi and Honda may receive additional development allowances under the cost cap system.

Honda were placed in the 8–10% deficit bracket behind the leading engine.