The Sweden striker already has 11 goals for the season, including a four-goal haul in Paris Saint-Germain's 5-0 demolition of Anderlecht in the Champions League last week.
That display came on the back of the 32-year-old's outrageous strike in les Parisiens' 4-0 win over Bastia and Wenger says his recent efforts have propelled him ahead of Messi and Ronaldo at present.
The 64-year-old told Telefoot: "Is Zlatan better than Messi & Ronaldo? Right now, I'd say he is. At 32, you know how to get the best from your talent."
Ibrahimovic had been tipped to leave PSG over the summer after just one season with the Ligue 1 champions, following the €64 million signing of Edinson Cavani from Napoli.
But the former AC Milan man made light of those rumours by signing a contract extension with the club in September, which will see him remain at the Parc des Princes until 2016.