The FIA has published the results of the latest Additional Development and Upgrade Opportunities (ADUO) evaluation for Formula 1 power units, with Red Bull-Ford still considered the benchmark. According to the governing body’s analysis, which covers all races from Melbourne to Budapest, the Red Bull-Ford internal combustion engine is the most powerful in F1.

Mercedes is 2-4% down on power, while Audi, Ferrari and Honda are more than 4% adrift; the Japanese manufacturer’s new powertrain, introduced at the Dutch Grand Prix, was not included. After the first quarter of the 2026 season, Mercedes had been granted one additional homologation for 2026 and 2027, while Audi, Ferrari and Honda received two each for this year and next.

No additional homologations have been awarded this time. FIA single-seater director Nikolas Tombazis said the analysis is robust, respecting confidentiality. ADUO has faced criticism for only considering the internal combustion engine, not the full hybrid system. Mercedes is widely considered to have the most powerful engine, a view echoed by Red Bull boss Laurent Mekies.