FIA approves sweeping F1 engine overhaul for 2027 and 2028 after early concerns over new power units
Formula 1’s technical future has taken a significant turn after the FIA officially approved a major package of power unit regulation changes that will reshape the sport’s engine philosophy from 2027 onwards.
Just months after the introduction of the all-new 2026 power units, Formula 1’s governing body, together with Formula One Management, teams and engine manufacturers, has agreed on a series of revisions designed to address concerns that emerged during the opening phase of the new regulations.
The changes represent one of the fastest regulatory responses seen in modern Formula 1 history. While the 2026 engine rules were initially promoted as a revolutionary step toward a more sustainable future, early feedback from drivers, engineers and manufacturers revealed several challenges related to energy deployment, battery management and overall vehicle performance.
Rather than waiting until the end of the current regulatory cycle, the FIA has chosen to intervene quickly in an effort to improve the racing product while preserving the environmental objectives that remain central to Formula 1’s long-term strategy.
Why Formula 1 decided to modify the 2026 engine concept
The 2026 regulations introduced a radically different power unit formula, significantly increasing the role of electrical energy while reducing the reliance on traditional internal combustion power.
On paper, the concept appeared highly innovative. However, once teams began racing under the new rules, concerns emerged regarding the extent to which drivers were being forced to manage battery deployment throughout both qualifying sessions and races.
Several paddock insiders suggested that drivers were spending too much time focusing on energy preservation rather than maximizing outright performance. In certain situations, competitors were unable to push flat-out for an entire qualifying lap, something many believed ran contrary to Formula 1’s traditional identity as the pinnacle of motorsport.
The FIA’s revised approach aims to restore a greater emphasis on pure performance while maintaining the sustainable fuel technologies that remain at the heart of the current engine formula.
The ultimate objective is clear: create faster, more aggressive cars, improve wheel-to-wheel racing and reduce the amount of energy management required from drivers during crucial moments of a race weekend.
Internal combustion engine power set for significant increase
The most substantial modification concerns the internal combustion engine, which will gradually regain a larger role in the overall power unit package.
Under the current 2026 regulations, the combustion engine delivers a maximum output of 400 kW. Beginning in 2027, that figure will increase to 420 kW before rising again to 450 kW in 2028. This progressive increase reflects the FIA’s intention to shift the balance of performance back toward the thermal engine while avoiding a complete redesign of the current power unit architecture.
To support the additional power output, fuel flow limits will also be increased over the next two seasons.
- 2027: Fuel flow increased by 5%
- 2028: Fuel flow increased by 13%
These adjustments are expected to provide drivers with stronger acceleration characteristics and reduce some of the energy-related limitations that became evident during the first season of the new regulations.
Electric power reduced but energy recovery improved
While the internal combustion engine gains importance, the electrical side of the power unit will experience a different evolution.
The maximum output of the MGU-K system will be reduced from 350 kW in 2026 to 300 kW from 2027 onward. This represents a notable shift away from the near-equal balance originally envisioned between electric and combustion power.
Importantly, however, Formula 1 has chosen to retain the overtaking mode that allows drivers to access up to 350 kW during attacking situations. As a result, overtaking opportunities and strategic racing elements should remain largely unaffected.
At the same time, energy recovery capability will continue to improve.
- 2026: 350 kW energy recovery
- 2027: 375 kW energy recovery
- 2028: 400 kW energy recovery
This means that although the electric motor’s peak contribution will decrease, the overall efficiency of the energy recovery system will continue to develop, helping maintain Formula 1’s commitment to advanced hybrid technology.
New power balance fundamentally changes the engine philosophy
Perhaps the most important aspect of the changes is the revised power distribution between the combustion engine and the electrical component.
When the regulations were launched, the FIA envisioned an almost equal contribution from both systems. That philosophy is now being adjusted.
2026 power distribution:
- 53% internal combustion engine
- 47% electric power
2027 power distribution:
- 58% internal combustion engine
- 42% electric power
2028 power distribution:
- 60% internal combustion engine
- 40% electric power
The revised percentages reveal a clear strategic shift. Formula 1 is moving away from the original near-50/50 concept and returning closer to a balance that many engineers believe is better suited to high-performance racing.
Potential impact on Ferrari, Mercedes, Audi and Red Bull
The regulatory changes could have significant implications for the competitive order in Formula 1.
Manufacturers Ferrari, Mercedes, Audi, Red Bull Powertrains and Honda have all invested heavily in developing power units around the original 2026 framework. Any adjustment to the balance between combustion and electric power has the potential to alter competitive advantages and development priorities.
For Ferrari and Mercedes, which have traditionally excelled in internal combustion engine development, the move could prove beneficial. Meanwhile, manufacturers that heavily optimized their projects around electrical performance may face a different set of engineering challenges as the regulations evolve.
The FIA hopes the gradual nature of the changes will prevent excessive costs while still allowing teams to adapt their development programmes without requiring complete redesigns of their cars.
The first major correction of Formula 1’s new era
Few expected the 2026 regulations to undergo such substantial revisions so quickly. Nevertheless, Formula 1’s leadership concluded that immediate action was preferable to allowing potential weaknesses in the rules to persist for years.
The result is a carefully structured roadmap that gradually increases combustion engine influence while preserving hybrid technology and sustainable fuels as central elements of the sport’s future.
Whether the changes ultimately deliver the intended improvements remains to be seen, but one thing is already clear: the technical landscape of Formula 1 for 2027 and 2028 will look noticeably different from the vision originally presented when the new power unit era began.
As teams continue developing their next-generation engines, the revised regulations are likely to become one of the most important factors shaping Formula 1’s competitive future over the coming seasons.
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