The Radical Cup Australia is a national motor racing series for racing the Radical SR3, built by Radical Sportscars. The series is sanctioned by Motorsport Australia, and run by a joint venture of the two Australian importers of Radical cars.
The current Radical Cup Australia was founded in 2022, but one-make racing for Radical cars in Australia dates back to at least 2011.
Unmodified examples of the Radical SR3 (including most variants from throughout the model's history, and both 1340 and 1500cc engined models) are eligible to compete.
The series is made up of a mixture of sprint (25-minute) and endurance (45 or 50-minute races).
Cars may (optionally) be shared between two drivers; if so, during endurance races there is a driver switch during a race pitstop; during a round featuring sprint races each driver drives two of the four races in the round.
Drivers are classified as Pro, Pro-Am or Am based on their age and professional experience in motorsport; there are multiple series trophies awarded, dependent on driver categorisation.
| Year | Overall winner |
|---|---|
| 2022 | Chris Perini |
| 2023 | Alex Gardner |
| 2024 | Peter Paddon |
| 2025 | - |