The Northampton Saints hooker has spoken out ahead of the Red Rose's autumn international campaign, which gets under way against Argentina at Twickenham on Saturday afternoon.
And, following 20 wins from 21 Tests dating back to 2015 which has moved England second in the world rankings behind New Zealand, Hartley feels the side can challenge for glory in two years' time.
Nineteen of those wins have come under the guidance of coach Eddie Jones with the one defeat being against Ireland as they were denied the Grand Slam in the 2017 Six Nations, but Hartley is "100 per cent" certain they can emulate the 2003 World Cup winners under the Australian tactician.
The 31-year-old said: "If you don't have these kind of goals, these dreams, I don't think you've got any chance of achieving them.
"We want to get better, we want to be No 1, we want to win a World Cup. You've got to talk about it.
"Being England, we've always had a target on us anyway. We’re not the surprise (packets) any more. We expect to give people a good hard game and I think people know that."