All Blacks great Dan Carter believes the current New Zealand side are better than the World Cup-winning squads he was involved in and that their extraordinary speed has taken them to greater heights.

New Zealand, ranked number one in the world and fresh from claiming a third consecutive Rugby Championship title, are preparing for a November test against England on Saturday, before travelling to Dublin to face Ireland next week.

The 36-year-old Carter, a three-times World Player of the Year during an illustrious career at fly-half for the All Blacks, believes the pace of New Zealand's attack will prove decisive against their northern hemisphere rivals at Twickenham.

"The rugby world has seen what the All Blacks have done since the 2015 World Cup when we had a fantastic campaign in England, but I personally feel they have got stronger," Carter said in Tokyo on Thursday.

"The speed that they are playing the game in the last couple of years has been a lot faster than other teams.

"But, we don't often get the chance to come up against northern hemisphere teams a lot... so this is a great test for the All Blacks, just to see where they are at.

"I just think the speed at which the All Blacks play the game might just be a little bit too much for England to live with them for 80 minutes."

When Carter quit internationals after being named Man of the Match in the 2015 World Cup final victory against Australia, there were concerns in New Zealand over who would replace the highest points scorer in test history.

Beauden Barrett has stepped up to fill Dan Carter's boots

However, Beauden Barrett has stepped seamlessly into his boots and has already matched Carter's 24 test tries for the All Blacks thanks to his lightning speed.

"I think what differentiates him from other 10s around the world is his attacking mindset and just having, not only the skills, but more importantly the speed that he has to create these opportunities," Carter added of his successor.

"The opposition can have all the momentum and putting all the pressure on the All Blacks, and then a moment of brilliance from a guy like Beaudy, who is fast enough to get through gaps that not many other players can, can just turn the game."

Follow Ireland v Argentina via our liveblog on RTÉ.ie/sport and the News Now app, watch live on RTÉ2 and the RTÉ Player or listen to live commentary on RTÉ Radio 1 this Saturday (kick-off 6.30pm)