The AU4 Australian Championship is an upcoming motor racing series in Australia for Formula 4 cars.
The new promoter for the series is AGI Sport, who have been the most successful team in Australian Formula 4, replacing the China-based Top Speed organisation.
[1] There will be two types of car on the grid simultaneously; the Tatuus F4-T421 with the Abarth engine (termed "Gen 2") used in the 2024 championship, and the Mygale M14-F4 with the Ford engine used from 2015 to 2019 ("Gen 1").
This is not typical in Formula 4 Championships, which are usually single-class spec series in which all participants are in identical vehicles.
[1] According to Motorsport Australia, the changes are to enable the broadest range of participants in the series, including (older) owner-drivers racing for enjoyment (and not aiming for a professional career overseas), and junior drivers seeking affordable racing experience in open-wheelers, as well as those contesting for the overall win in the latest generation F4 car.