what was the power split in the engine in f1 in 2025
In F1’s 2025-spec power units, the split was still roughly 80% internal combustion engine (ICE) and 20% electric/ERS power. The big 50/50 split started with the 2026 rules, not 2025.
Quick Scoop
For 2025, the engines were still using the older hybrid balance:
- About 80% ICE
- About 20% electric power from the energy recovery system
By contrast, 2026 moved to a roughly 50/50 split, with electric deployment jumping sharply to around 350 kW.
What that means
The 2025 setup was much more combustion-heavy than the newer formula. The electric side was important for hybrid efficiency and performance, but it was not yet close to matching the engine for outright power.
Simple comparison
| Season | Approximate split | What it felt like |
|---|---|---|
| 2025 | 80% ICE / 20% electric | Mostly engine-driven |
| 2026 | 50% ICE / 50% electric | Much more dependent on battery deployment |
TL;DR
The 2025 F1 power unit split was roughly 80/20 in favor of the combustion engine.
