The AFC North side have won just twice so far this season, while the Patriots top their division with a 6-2 record.
The quarterback told reporters: "The scheme has been so good for so many years. The players have been really good. It's a very veteran defense too, so solid coaching, a solid scheme, solid players.
"Troy [Polamalu] is still one of the best players in the league and Ryan Clark is a phenomenal safety. Ike Taylor is a great corner, Lawrence Timmons is a great player. They have really veteran guys in the front. They have a good defense and the way we've been playing offensively, we can't be up and down like we've been.
"We have to be more consistent. Hopefully this is our best week to be able to do that. We got off to a good start in practice so we'll see how it goes."
The Steelers' defense has made 475 tackles, 10 sacks and four interceptions so far this season.