Australia coach Tim Sheens has described his side's showing during their Rugby League World Cup final win over New Zealand as the Kangaroos' best performance during his four-and-a-half-year reign.

Billy Slater and Brett Morris scored two tries each as the tournament favourites beat the defending champions 34-2 at Old Trafford.

"This was the best performance of my time [in charge]," Sheens told reporters.

"I'm not going to comment on others. They have been a great side and have grown old together. The seniority in the team really stood up.

"Firsts are a big thing; A first Grand Final, a first World Cup and what do you say? A terrific occasion and atmosphere at the Theatre of Dreams."

Australia scored 272 points and conceded just 24 during their six games at this year's World Cup.