What is ADUO? The F1 engine regulation that could define season

With 'ADUO' set to become one of the most frequently used acronyms in the Formula 1 paddock during the 2026 season, Sky Sports F1 explains why the sport's new engine development rules are fast becoming a hot topic.

In what was widely considered to be the biggest regulation change in the sport's history, the introduction of new power units, along with new chassis, saw electrical power increased to share a 50-50 split with internal combustion engines.