What changes in F1 for 2027?
2027 is not another big reset. The 2026 rules carry over, with one notable refinement to the power units: the FIA and engine makers have agreed in principle to shift the power split back toward the combustion engine, raising its output and trimming electrical deployment, to ease the energy management drivers face. The exact figures were still pending final ratification.
Not a reset, an adjustment
The major regulation change is 2026, with its half-electric power units, active aero and smaller cars. 2027 keeps that package and adds a targeted change to how the power unit deploys its energy, rather than a new car or a new aero rulebook.[1] The driver behind it is the concern that the 2026 split, close to even between combustion and electrical power, could force drivers to manage energy too aggressively.[2]
The power-unit rebalance
Under the proposals, the combustion engine's maximum output rises, helped by a higher fuel-flow allowance of around 50 kilowatts, while peak electrical deployment from the MGU-K is cut by a similar amount, moving the split back toward the combustion side for 2027 and again for 2028.[1] The aim is to reduce the lift-and-coast saving that the 2026 rules might otherwise demand, which should help the racing.[2]
Agreed in principle, not yet locked
As of mid-2026 these changes were agreed in principle between the FIA and the power-unit manufacturers but still required a final World Motor Sport Council vote, so the exact numbers may shift before they are confirmed.[3] A separate idea, a return to V8 engines, is being discussed for the end of the decade rather than for 2027, and should not be confused with these near-term tweaks.[1]
:::analysis The headline is reassurance: there is no second upheaval coming straight after the 2026 reset. The 2027 work is the sport watching how the new power units race and dialling the energy balance if drivers end up coasting too much. It is the kind of in-flight correction that only becomes necessary once the new cars have actually run.
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Related reading
- [1]Agreement reached on proposed 2027 and 2028 F1 changes (Formula1.com) (formula1). Accessed 2026-06-19.
- [2]FIA reveals latest tweaks to F1 rules for 2027 (Autosport) (autosport). Accessed 2026-06-19.
- [3]FIA: proposals agreed in principle for 2027 changes (FIA.com) (fia). Accessed 2026-06-19.