"Right now the dream of winning a world title is far away. I think that if you are not in Ferrari or Mercedes, winning the world title is a bit difficult," he told Efe news here.
Sainz, who is leaving Renault at the end of the year to join McLaren, said that he expects to compete for the podium places next season.
Now 12th in the driver's standings, Sainz's best performance in 79 Grand Prix races is a 4th place finish.
McLaren, he said, "has gone through a difficult year," but the experience has helped the team "to learn, reset a bit and start again from scratch".
He said that signing with McLaren, where compatriot Fernando Alonso failed in his bid for a third world championship, was a safe bet because it was "the second most prestigious team in Formula 1 (after Ferrari)".
The driver downplayed criticism concerning the lack of excitement around the sport in recent years.
"Formula 1 has always been dominated by some individual team," he said, adding that this season has been "entertaining" thanks to the battle for the title between a pair of four-time champions: Briton Lewis Hamilton (Mercedes) and Germany's Sebastian Vettel (Ferrari).
Hamilton clinched his fifth championship two weeks ago in the Mexican Grand Prix.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)