Arsenal's attack-minded squad have been complemented by Wenger's change from a 4-4-1-1 to a 4-3-3 formation this season that has brought 10 goals and victories in their first two league matches.
The Londoners also recorded a 5-1 aggregate win over Celtic to qualify for the Champions League group stages.
United's 5-0 thrashing of Wigan Athletic last Saturday suggested they were beginning to adapt to life without former talisman Cristiano Ronaldo after going into the game on the back of a shock 1-0 defeat at promoted Burnley.
"Two years ago we had 83 points and didn't win the title. Last year Liverpool had 86 points and didn't win the title," Wenger told the club's website.
"Let's not speculate on any weakness of any other team but just look how high that level is and that it means we need really to be super-consistent."
Arsenal's Champions League hopes were wrecked last season when Ronaldo produced a dazzling semi-final second leg display at the Emirates.
United's 4-1 aggregate win underlined a chasm in quality between the two rivals but the availability of Andrei Arshavin and the return to fitness of Eduardo da Silva and Tomas Rosicky should make Arsenal a tougher proposition on Saturday.
Liverpool manager Rafa Benitez has demanded more from his squad ahead of Saturday's trip to Bolton Wanderers after losing twice in three games this season.
"Clearly the team...has to improve," Benitez told the club's website.
