Formula 1 Set for Engine Overhaul as FIA Approves Gradual Shift Away from 50/50 Power Split

Formula 1 has confirmed proposed changes to its controversial power-unit regulations for the 2027 and 2028 seasons following agreement between stakeholders.

The FIA, Formula 1 Management and the power-unit manufacturers have agreed to shift the balance further in favour of internal combustion power over electrical energy.

The current 53/47 split between ICE and electrical power will increase to 58/42 for the 2027 season, with a 60/40 split set to be introduced in 2028.

The changes will result in a 5% increase in fuel flow next year, with ICE power output rising from 400kW to 420kW. Crucially, this will be achieved without significant hardware changes — a key concern for several manufacturers.

Maximum power output from the electric motor will decrease from 350kW to 300kW. However, Overtake Mode will still allow drivers to access the full 350kW boost. The maximum energy harvest limit will also increase to 375kW, up from the current 250kW.

“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 said.

“The 2026 Formula 1 regulations were developed and agreed in close partnership between the FIA, FOM, teams, OEMs and Power Unit Manufacturers.

“These latest amendments reflect the continuation of this collaboration with all stakeholders working collectively to refine the framework and address identified operational challenges.”

The FIA will also ease cost pressures on the PUMs, with amendments made to the power-unit financial regulations to account for the additional development expenditure required.

The compromise delivers a gradual transition across two seasons, addressing concerns raised by Ferrari and Audi over the limited timeframe available to implement a major change for 2027. Mercedes and Red Bull, meanwhile, have supported the proposal from the outset.

The proposed amendments have now been submitted to the World Motor Sport Council for ratification, with a vote scheduled for June 23 in Macau.

Watch every race of the 2026 season live on Apple TV

Want more F1Chronicle.com coverage? Add us as a preferred source on Google to your favourites list for the best F1 news and analysis on the internet.

Written by

Jawad Yaqub

An eCommerce Specialist by day and reporting on F1 by night. Jawad is passionate about motorsport, having provided accredited F1 coverage for more than a decade and is a member of the AIPS (International Sports Press Association). Live blogging (almost) every grand prix too since 2014, as well as articles on the Supercars Championship. Also keen on sustainability, photography, collecting vinyl, (trying to) expertly barbeque and learning to Dad.

More articles by Jawad Yaqub →