Formula 1 and the FIA have settled on a two‑step regulation change that will roll out in 2027 and 2028. The package aims to lower the share of electrical power in the power unit and to restore a more traditional balance between the internal‑combustion engine (ICE) and the energy‑recovery system (ERS).
Under the current 2026 rules the ICE supplies about 53 % of total power, but the new plan will shift the split to 58 % for 2027 and 60 % for 2028. To achieve that, the maximum ICE output will rise from 400 kW to 420 kW in 2027 and to 450 kW in 2028, while fuel‑flow limits increase by 5 % and then 13 % respectively. The overtaking‑mode cap stays at 350 kW, but the harvesting‑mode ceiling climbs to 375 kW in 2027 and 400 kW from 2028. The staged approach eases hardware changes for manufacturers such as Audi, though Mercedes had pushed for a larger 50 kW reduction in 2027.
The FIA says the revised rules will be fast‑tracked for formal approval, giving teams early clarity. The World Motorsport Council will vote on the proposal at its June 23 meeting in Macau.
