Leading from start to finish, the Aussie team of Turrin, Alex Hill, Alex Purnell and Jack Hargreaves finished 0.37 seconds ahead of Romania and 0.84 seconds ahead of bronze medallists Italy.

It was back-to-back gold for Australia with the women's fours teams winning their final as well.

The women's team finishing 0.34 seconds ahead of a fast-finishing Netherlands with Ireland third five seconds behind.

The Aussie men broke Great Britain's hold on the event setting a pace which forced the British literally off course in the dying seconds.

Great Britain went off course and crossed into Italy's lane with the Italian team doing incredibly well to claim third.

The Australian team had collected silver in the past three Olympics and collected their first gold in the event since the original Oarsome Foursome at the 1992 and 1996 Games.

Turrin made the switch to the men's fours at Tokyo after finishing sixth in the pairs final at Rio in 2016.

Turrin's teammates Purnell and Hargreaves are Olympic debutants while Hill scored a silver medal in the men's fours at the last Games in 2016.

It has been a successful move to the fours with the team crowned world rowing champions in 2018 and now Olympic champions.

Turrin praised the spirit of the Dungog community which spurred him on to success.

"You definitely remember where you come from and you represent the people who supported you and helped you get there when you were younger," Turrin said before his second Olympic campaign.

"They were always very supportive as a community there [Dungog] when I was going for underage stuff, even fundraised to get myself overseas.

"Everyone in the community would pitch in and help get you there.