The Herald looked at online prices for Countdown, New World, Pak'nSave, and Aldi for seven everyday items and a bottle of wine.
Even when converted to New Zealand dollars the A$30.46 total for the Aldi purchases was $33.93 - still close to $10 cheaper than Pak'nSave's total of $42.25.
Bread, milk, cheese and free-range eggs were remarkably cheaper online at Aldi Australia - and the eggs were bigger as well.
Perusing the online aisles of Aldi there are other specials the average New Zealander is unlikely to see in the supermarket.
A French cheese available at Aldi for $6 hit headlines and achieved "cult-like" status online after reviews found was it was better value than regular cheddar.
The news Aldi had looked at New Zealand as a location comes as Kiwis are facing a cost-of-living crisis.
It also comes on the heels of the Commerce Commission revelation that Countdown and Foodstuffs were making excess profits of about $430 million a year - more than $1 million a day.
Aldi is popular in Australia with more than 570 stores that employ more than 13,500 people. It claims to save families who switch to its supermarket $2400 ($2656) a year.
A "Bring Aldi to New Zealand" Facebook page has around 1500 members and regular posts calling for the giant to open here.
Wairarapa local Willow Falleni started the page in 2017 when she returned to New Zealand after living in Australia where she was a regular shopper at Aldi.
"I believe it will make it more affordable for New Zealand consumers especially now with the cost of living so high," Falleni said.
"Now with the changes the Government is making I sincerely hope Aldi coming here can be a reality sooner rather than later."
Falleni launched a petition to bring Aldi to New Zealand. More than 1000 people have signed so far.
The trolley test
Of the seven items popped in the basket all but butter were cheaper at Aldi.