Australia have won netball's Constellation Cup for a seventh straight time after overcoming a frenetic New Zealand comeback to post a 53-46 win in game four in Perth.

The Diamonds blitzed the Silver Ferns with a 16-7 opening-quarter onslaught at RAC Arena on Sunday, and led by as many as 16 goals during the second term as their suffocating pressure proved too much to handle.

But with star shooter Maria Folau nailing almost everything that came her way, the Silver Ferns reduced the margin to seven goals in the third quarter, and then just four goals with seven minutes remaining.

The Diamonds kept their cool at the death to secure the win and level the series at 2-2, claiming the Constellation Cup on superior goal percentage.