Eddie Jones says England still have improvements to make if they want to be classed alongside the World Cup-winning vintage of 2003.
Saturday's 37-21 victory over Australia at Twickenham left England to savour an unbeaten 2016, in which they have won all of Jones' games in charge so far.
The triumph against the Wallabies - sealed by a storming second-half turnaround - was England's 14th in sequence, matching a record set by Clive Woodward's side, who lifted the Webb Ellis Cup.
Jones' success has generally been built on a physical style of play, as well as the kicking excellence of George Ford from the hand and Owen Farrell from the tee, leaving their coach to crave a more rounded approach.
"I think the 2003 side were a much better side than we are at the moment," said the Australian.
"They could win any number of ways. They had a very, very consistent scrum and line out.
"We don't have that yet, but we're getting there, so they were a much better side than we are."
Jones has been bullish about his determination to take England to the top of international rugby and continued to urge his players to strive for that goal.
"We can't get too ahead of ourselves, we're only the number two team in the world," he said, with world champions New Zealand topping the rankings.
"We want to be number one so we've got a long way to go to achieve that.
"We're hell bent on achieving that. We've got the talent here, it's just if we get the desire and the cohesion right, that's what we're aiming to do."
Though delighted with England's efforts, the ever-wary Jones was quick to point out that none of his players are untouchable despite their achievements.
He added: "Just because we've won 13 games, there's not one player that would automatically be picked in a world XV, and that's a world-class player. But we're moving in the right direction."
Though Jones said he took "zero" satisfaction from beating the country of his birth, his highlight from a stellar year was whitewashing the Wallabies 3-0 in their own back yard.
"I'd go back to the second or third test in Australia," he said when asked for his stand-out success.
"Second Test again we were under the pump and we defended for X number of phases and ended up winning that game convincingly.
"And the third Test, we had no right to win and we won that, so they're pretty good efforts."