Chaz Mostert is the 2025 Repco Supercars Champion, but the final Sunday race at the Adelaide Grand Final delivered that title through pure end-of-season chaos. Broc Feeney arrived with a 23-point lead and momentum on his side, looking set to seal a first championship. Instead, a messy opening lap and late mechanical trouble flipped the standings and handed Mostert a maiden crown.

The race itself belonged to Matt Payne. From the start, Payne launched cleanly and took control at the front, building a steady gap while the championship contenders fought behind him. Feeney’s getaway was shaky, and he was instantly forced to defend from Ryan Wood, Mostert’s teammate. The pressure boiled over at Turn 6 on lap one. Wood dived up the inside, contact was made, and Feeney was spun across the track. The field scattered, several cars were caught up in the mess, and an early Safety Car neutralised the race. In a few seconds, Feeney’s title bid went from strong to fragile.

Feeney rejoined in 21st, and with the field bunched, he still had a pathway back. After the restart he began slicing forward, driving with urgency and aggression. Wood was later handed a 15-second penalty for the incident, but Feeney’s bigger enemy was his car. Engine issues that had been troubling him earlier in the weekend returned right when he needed clean speed. A slow right-rear wheel at his first pit stop only deepened the hole, and the Camaro’s pace steadily dropped away.

Mostert, meanwhile, did exactly what champions do when the door opens. He kept his nose clean, stayed in the leading group, and methodically climbed into second after the pit cycles. With Feeney stuck in traffic and losing pace, Mostert didn’t need heroics just a composed, points-smart drive. He managed the gap, avoided risk, and made sure nothing silly interrupted the opportunity.

Up front, Payne was untouchable. He executed his strategy smoothly, conserved tyres, and drove away to claim his second Adelaide victory, finishing almost six seconds clear. Mostert brought it home in second place, which was more than enough to secure the championship in his 13th full season. Will Brown rounded out the podium and, crucially, edged past Feeney in the final standings.

For Feeney it was a brutal ending to a dominant year 14 wins and 19 poles undone by a first-lap spin and a wounded engine. He limped to 20th, even going a lap down late. Adelaide, as it often does, proved that Supercars can turn a season on a single corner crowning a new champion and breaking another’s heart in the same afternoon.

Mostert Crowned 2025 Supercars Champion After Chaotic Adelaide Finale

Feeney Fires the First Shot as Adelaide Sets Up a Winner Takes All Finale