Audi introduced a new Formula 1 power unit at the Barcelona Grand Prix following the FIA's first ADUO review.
Audi fitted both cars with updated internal combustion engines and turbochargers at the Catalan race. The changes included tweaks to improve driveability after the FIA communicated results of the Additional Development and Upgrade Opportunities period.
The first ADUO review occurred after the Canadian Grand Prix, with results released to manufacturers in Monaco. Red Bull Powertrains raised concerns about the process, prompting a further FIA review, though the original findings remained valid.
The upgrades represent the initial step in Audi's ongoing development programme based in Ingolstadt and Hinwil. Observers noted the swift implementation caught the paddock by surprise.
