Phased changes to F1 power units agreed for 2027 and ’28

The FIA, Formula One Management (FOM), teams and power unit manufacturers have agreed phased changes to the Formula 1 power units across the 2027 and '28 seasons.

Last month it was announced that an agreement in principle was reached to increase the power output of the internal combustion engine (ICE) relative to the electrical power from the current 53/47 split to 60/40. That shift was in response to energy management challenges so far with the new regulations – in particular when it comes to qualifying laps – but not all power unit manufacturers were aligned on how to achieve the change.

The revision to the power units has now been agreed with all stakeholders, with two stages of introduction for new regulations. The first will see the fuel flow increased by 5% next year in order to allow the maximum ICE power to rise from the current 400kW to 420kW in 2027.

The maximum power for the MGU-K will also decrease at the same time from 350kW to 300kW, although harvesting power will increase from 350kW to 375kW, to allow the battery to be charged more quickly. That will deliver a power split of around 58/42 in favor the ICE.

Then, in 2028, the fuel flow will increase by 13%, allowing a maximum ICE power output of 450kW, while the maximum harvesting power further increases to 400kW. The second step of changes is set to provide the 60/40 power split that has been targeted.

“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,” an FIA statement read. “Supporting measures relating to power unit supply conditions, race operations and the relevant financial regulations are also included.

“The FIA will now expedite the formal approval process to provide all parties with early clarity and sufficient time to adapt to the revised requirements.”

With all stakeholders in agreement, the changes will require approval from the World Motor Sport Council (WMSC), with the next meeting set for June 23 in Macau.