Formula 1 stands on the threshold of its most significant technical shift since the hybrid era began in 2014. The 2026 regulations will reshape the sport’s power unit landscape with lighter chassis, reduced dimensions and a fundamental rebalancing toward electrical energy. For the first time since BMW and Honda arrived together in 2000, two new engine manufacturers will enter the championship simultaneously. The grid will expand to eleven teams, each relying on one of six distinct power unit suppliers as the championship enters uncharted territory.
Mercedes continues its customer dominance across four teams
Mercedes will power more entries than any other manufacturer when the new regulations arrive. The Silver Arrows will supply engines to McLaren, Williams and Alpine alongside its own factory operation. This extensive reach reflects the German marque’s position as the most successful constructor of the turbo hybrid era, having claimed eight consecutive titles between 2014 and 2021.
McLaren’s relationship with Mercedes stretches back to a legendary partnership that delivered championships in 1998, 1999 and 2008. After a difficult Honda interlude and a transitional Renault period, the Woking outfit rekindled its Mercedes alliance in 2021. The decision proved transformative as McLaren ended a nine-year victory drought at Monza that season before capturing the constructors’ championship in 2024. The team’s back-to-back titles in 2024 and 2025, culminating in Lando Norris becoming world champion, vindicated the partnership. Their current agreement runs through 2030.
Williams enters the new era with cautious optimism despite failing to win since adopting Mercedes power in 2014. The Grove-based team’s resurgence under James Vowles, who joined from Mercedes as team principal, lifted Williams to fifth in 2025. The arrival of Carlos Sainz alongside Alex Albon strengthens their driver lineup as they hope to capitalise on Mercedes’ experience with major regulation changes.
Alpine’s switch from Renault’s in-house programme to Mercedes customer status proved controversial. Workers at the Viry-Châtillon facility protested the decision at Monza in 2024, holding banners proclaiming “save 50 years of French Formula 1”. Yet Renault’s leadership argued the investment no longer justified results after Alpine finished last in 2025. Former CEO Luca de Meo acknowledged the need for “shortcuts” to competitiveness, and Mercedes represented the most direct path available.
Red Bull Ford launches unprecedented in-house operation
Red Bull will field its first self-manufactured engines since joining the grid in 2005. The Austrian outfit committed to this path after Honda announced its 2021 departure, even though the Japanese manufacturer later reversed that decision. By then Red Bull Powertrains had already formed its technical alliance with Ford, ending the American brand’s 23-year absence from Formula 1.
Ford brings substantial pedigree despite its long hiatus. The American giant won 13 drivers’ championships between 1968 and 1994, plus 10 constructors’ titles from 1968 to 1981, predominantly through its Cosworth partnership. Yet team principal Laurent Mekies tempered expectations in recent interviews, stating it would be “silly” to expect immediate parity with established manufacturers like Mercedes and Ferrari.
Racing Bulls will also adopt the Red Bull Ford power unit, marking the Faenza squad’s fifth different engine supplier since Red Bull acquired the team in 2006. The Italian outfit previously ran Cosworth, Ferrari, Renault and Honda engines across various periods and rebrands. Their role as the junior team makes them natural recipients of the parent company’s power units.
Ferrari supplies three teams including new entrant Cadillac
Ferrari remains the only constructor to have contested every Formula 1 season since the championship’s 1950 inception, always with engines of its own design. That continuity makes the Prancing Horse statistically the sport’s most successful power unit supplier with 16 constructors’ titles and 15 drivers’ championships. An 18-year drought without either crown has not diminished Ferrari’s appeal as an engine partner.
Haas has relied on Ferrari power since its 2016 debut. The American team’s close technical relationship with Maranello extends beyond engines to numerous purchased components, a strategy team owner Gene Haas views as essential for a small operation to remain competitive. The partnership has delivered consistent mid-field results, though Haas has not matched its 2018 fifth-place finish since that season. Oliver Bearman, a former Ferrari junior, drives for Haas in 2026 alongside Esteban Ocon.
Cadillac will join the grid as Ferrari’s third customer after a protracted entry process. What began as an Andretti Global proposal in 2023 faced rejection over concerns about engine independence. Michael Andretti’s subsequent departure, increased involvement from sponsor TWG Global and rebranding to Cadillac Racing unlocked approval for 2026 entry. The team will use Ferrari power units through 2028 before switching to General Motors-built engines, adding another manufacturer to the grid in 2029.
Honda commits to Aston Martin as works partner
Honda reconsidered its Formula 1 future when the 2026 technical regulations aligned with its engineering philosophy. With Red Bull already committed to its own project, multiple teams competed for Honda’s services. Aston Martin secured the partnership, gaining works status after 16 years as a Mercedes customer dating back to its Force India era.
The Silverstone team hopes Honda’s involvement will finally translate substantial investment into championship contention. Lawrence Stroll’s billions have funded new facilities and recruited legendary designer Adrian Newey, yet results have disappointed with a seventh-place finish in 2025. Fernando Alonso, now 44, views the 2026 reset as potentially his final opportunity for title success.
Honda brings proven championship credentials from its recent Red Bull partnership, which delivered four consecutive titles between 2021 and 2024 with Max Verstappen. The manufacturer’s technical expertise with hybrid systems and reliability record make it an attractive partner despite its previous struggles with McLaren between 2015 and 2017.
Audi enters as sixth manufacturer with modest expectations
Audi will debut as Formula 1’s sixth power unit supplier after completing its Sauber takeover. The German manufacturer joins an exclusive group that includes Mercedes, Ferrari, Red Bull Ford, Honda and the incoming General Motors programme. Chief operating officer Mattia Binotto acknowledged in May that “we won’t have the best power unit” given the established competition.
Sauber’s penultimate finish in 2025 despite scoring 70 points with Gabriel Bortoleto and Nico Hülkenberg illustrates the scale of Audi’s challenge. The team enters the new regulations without the institutional knowledge accumulated by rivals through previous power unit transitions. Yet Audi’s resources and commitment to a long-term Formula 1 project suggest patience with initial results as development progresses.
The 2026 season will test whether new entrants can match established manufacturers or whether experience with hybrid technology proves decisive. Ferrari, Mercedes and Honda all carry knowledge from the 2014 regulations into this next generation, while Red Bull Ford and Audi build their programmes from different starting points. The nearly equal split between internal combustion and electrical power represents the most radical shift since hybrids arrived, potentially reshuffling the competitive order as teams adapt to unprecedented technical demands.
