Devon Conway and Rachin Ravindra smashed rapid unbeaten centuries to set up New Zealand's successful pursuit of a 283-run victory target, which they reached with 13.4 overs to spare.
Ravindra's unbeaten 123 off 96 balls, studded with 11 fours and five sixes, earned the 23-year-old player-of-the-match award on his World Cup debut.
New Zealand lost Will Young for nought in the first over but Conway, who smashed a career-best 152 not out, and Ravindra turned the heat back on England with their free scoring.
Ravindra, who shared unbroken 273-run partnership with Conway, took one delivery fewer to notch up his maiden ODI hundred.
New Zealand rested Williamson (knee) and fast bowler Tim Southee (thumb) to give them more time to recover from surgery.
Persons:
Narendra Modi, Rachin Ravindra, Andrew Boyers, Devon Conway, Joe Root, Jos Buttler, Jonny Bairstow, Matt Henry, Buttler, Will Young, Conway, Ravindra, Tom Latham, Kane Williamson, Rachin, Williamson, Tim Southee, Ben Stokes, Harry Brook, Amlan Chakraborty, Ken Ferris, Ed Osmond
Organizations:
Cricket, ICC Cricket, New Zealand, Narendra, Rights, England, Zealand, nought, Thomson
Locations:
England, New, Ahmedabad, India, Rights AHMEDABAD, Rachin, Devon, Zealand