Ageless Kiwi runner Nick Willis has stormed to a record-equalling victory at the Fifth Avenue Mile in New York.

Willis beat off a large field to win the high-profile race for a fourth time, matching the deed of Spaniard Isaac Viciosa in the 1990s.

The 34-year-old unleashed a finishing kick to win in a slick three minutes 51.31 seconds, the ninth-quickest time in the 36-year history of the race.

Willis ran faster when winning in 2008. His other wins were in 2013 and 2015 while John Walker notched the only other win by a Kiwi, in 1984.

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Two-time Olympic 1500m medallist Willis attributed victory to leaving his sprint until the last possible moment.

"It looks closer than it is to the finish, so if I wait and wait and wait and let them all make their moves, and hopefully I haven't gone to fifth gear by then, I can still go a little bit further," Willis said.

"So I tried to use my old-man savvy today."

Willis finished 0.69sec ahead of Chris O'Hare, avenging the outcome of the Hoka One One Long Island Mile on Wednesday when the Briton pipped him to the line.

Meanwhile, Jenny Simpson of the United States extended her women's record to six wins in New York, storming to victory in a course-record time.