The Red Bull Racing RB16 and RB16B are Formula One racing cars designed and constructed by Red Bull Racing to compete during the 2020 and 2021 Formula One World Championships, respectively. They were powered by Honda's RA620H (2020) and RA621H (2021) power units, being the second and third Red Bull to use the Japanese manufacturer's engines. The drivers for 2020 were Max Verstappen and Alexander Albon, both of whom were retained by the team for a fifth and second season respectively, with Sergio Pérez taking Albon's place for 2021. Albon became the team's test and reserve driver for the 2021 season. The RB16 was planned to make its competitive debut at the 2020 Australian Grand Prix, but this was delayed when the race was cancelled and the next three events in Bahrain, Vietnam and China were postponed in response to the COVID-19 pandemic. The RB16 made its debut at the 2020 Austrian Grand Prix, while the RB16B made its debut at the 2021 Bahrain Grand Prix. The pandemic prompted the delay of technical regulations that had been planned for introduction in 2021. Under an agreement between teams and the Fédération Internationale de l'Automobile, 2020-specification cars—including the RB16—saw their lifespan extended to compete in 2021, with Red Bull producing an updated chassis called the RB16B, which used Honda's upgraded RA621H power unit
