Mercedes has downplayed its status as favourite heading into the 2025 Formula 1 season, but the team’s powertrains division has acknowledged the possibility of one manufacturer dominating the sport’s next era. With new engine regulations looming in 2026, Mercedes High Performance Powertrains Managing Director Hywel Thomas has suggested the technical rulebook could enable a repeat of the dominant performances seen in previous regulatory cycles. The German manufacturer powered Lewis Hamilton to six of his seven world championships during the hybrid era that began in 2014, establishing a benchmark that rivals spent years trying to match.
Power unit revolution creates opportunity for dominance
The 2026 regulations will introduce fundamentally different power unit architecture compared to the current generation. The internal combustion engine’s output will be reduced whilst electrical power will increase significantly, creating a near 50-50 split between conventional and hybrid power. This represents the most radical departure from traditional Formula 1 engine design in the sport’s history, with the balance between thermal efficiency and electrical deployment becoming the critical performance differentiator.
Thomas acknowledges this technical revolution creates the conditions for one manufacturer to establish a significant advantage. Speaking about the development process, the HPP boss highlighted how the complexity of the new regulations means teams are working in largely uncharted territory. The scope for innovation within the technical rulebook could enable a breakthrough that competitors struggle to replicate, mirroring the advantage Mercedes enjoyed when hybrid engines first arrived in 2014.
The German manufacturer’s power unit division has been working on the 2026 engine for several years, investing substantial resources into understanding the new formula. However, Thomas maintains a cautious stance despite the team’s considerable expertise in hybrid technology. The competitive landscape has shifted dramatically since Mercedes last enjoyed sustained dominance, with multiple manufacturers now possessing advanced hybrid capabilities.
Learning from previous regulatory cycles
Formula 1’s history provides clear evidence that major regulation changes can produce extended periods of single-team superiority. Mercedes dominated from 2014 to 2020 largely due to its power unit advantage, winning seven consecutive constructors’ championships. Before that, Red Bull Racing’s aerodynamic mastery under the blown diffuser regulations delivered four straight titles between 2010 and 2013.
The current era has seen Red Bull Racing establish control through the RB21’s aerodynamic efficiency, though McLaren emerged as genuine challengers during the 2024 season. This competitive evolution took three years to develop, suggesting that if one manufacturer nails the 2026 regulations, rivals could face a lengthy catch-up period.
Thomas recognises this pattern but emphasises that predicting which manufacturer will succeed remains impossible until the new power units hit the track. The integration between chassis and power unit will become even more critical under the 2026 rules, meaning teams must optimise both elements simultaneously. A powerful engine in a poorly designed chassis will not deliver championships, just as the best aerodynamic package cannot overcome a significant power deficit.
Mercedes balances optimism with realistic expectations
Despite the technical optimism within HPP, Mercedes has consistently rejected suggestions that the team enters 2025 as championship favourite. The arrival of Lewis Hamilton at Ferrari has reshaped the driver market, whilst Mercedes promotes 18-year-old Andrea Kimi Antonelli alongside George Russell in the W16.
The team finished second in the 2024 constructors’ championship but remained distant from Red Bull’s overall performance level. Several race victories during the second half of last season demonstrated the W15’s potential, yet consistency proved elusive. Mercedes technical director James Allison has spoken openly about the development direction for 2025, acknowledging the team must find significant performance gains to challenge for titles.
Thomas’s comments about potential dominance therefore represent a longer-term perspective focused on 2026 rather than immediate expectations. The current season serves as a crucial development year, allowing Mercedes to refine its understanding of the W16 whilst simultaneously finalising the revolutionary 2026 power unit. This dual focus stretches resources but positions the team to capitalise if its engine programme delivers the anticipated breakthrough.
Regulatory framework aims to prevent runaway advantage
The FIA has implemented several mechanisms designed to prevent the kind of sustained dominance Mercedes achieved during the previous hybrid era. The cost cap restricts spending across all teams, theoretically limiting the resources any single manufacturer can deploy to maintain a technical advantage. Aerodynamic testing restrictions also penalise successful teams, with wind tunnel and CFD allocation scaled according to championship position.
These regulations should compress the competitive field, making it harder for one team to establish and maintain a multi-year advantage. However, power unit development sits partially outside the cost cap structure, creating a potential loophole for manufacturers with superior engine programmes. If Mercedes or another manufacturer develops a significantly superior power unit for 2026, customer teams would also benefit, potentially creating a manufacturer-based hierarchy rather than team-specific dominance.
Thomas acknowledges these regulatory guardrails whilst maintaining that the technical complexity of the 2026 rules creates opportunities for innovation that could overcome such restrictions. The balance between electrical and conventional power requires fundamentally new approaches to energy management, cooling systems, and integration with the chassis. A breakthrough in any of these areas could deliver advantages that prove difficult to legislate away.
Impact on customer teams and competitive balance
Mercedes supplies power units to Williams and McLaren, meaning any advantage the factory team develops for 2026 will ripple through the grid. McLaren has emerged as a genuine championship contender with the MCL39, demonstrating that customer teams can challenge manufacturers when the chassis performance is strong enough.
If Mercedes delivers the strongest 2026 power unit, three teams would immediately benefit, potentially creating a manufacturer-based competitive tier. This scenario could produce closer racing amongst the Mercedes-powered teams whilst establishing a gap to rivals using different engines. The competitive balance would then depend on whether Ferrari, Red Bull Powertrains, or new entrant Audi can match the German manufacturer’s output.
Thomas’s refusal to rule out single-manufacturer dominance therefore carries implications beyond just Mercedes’ factory team. The entire competitive structure of Formula 1 could be reshaped by the 2026 regulations, with customer team relationships becoming even more strategically important. Williams’ signing of Carlos Sainz from Ferrari reflects this reality, with teams seeking to position themselves with the right engine partner ahead of the regulatory revolution.
