Former Prime Minister Jim Bolger says he supports longer parliamentary terms.
The Government's announced a two-year review of New Zealand's electoral rules.
It will look at the parliamentary term, and consider whether the voting age should be lowered.
Bolger told Nick Mills when he was PM, he was in favour of four years.
"I felt three years was too short, five years was too long and four was about the right level given the complexity of modern government and given the time it takes to make the change that is needed," Bolger said.