After starting the Premier League campaign with two defeats, Unai Emery’s side have strung together a six-match winning sequence and will move level on points with third-placed Chelsea if they beat Leicester City in Monday's 20:00 BST kick-off.
While forwards such as Alexandre Lacazette and Pierre-Emerick Aubameyang have been enjoying the limelight for their exciting attacking play, Neville says it is defensive midfielder Torreira who is their driving force.
"It allows these players to do what they do best. In the past under Arsene Wenger they never had that type of player who complemented the unbelievable talent they have in that team."
Torreira, a summer signing from Sampdoria, was slowly integrated into the Arsenal first team, earning his first Premier League start in the 2-0 home win over Everton on 23 September.
"They have an absolute bargain. Torreira is following the orders of his manager and, dovetailing to that, Xhaka has improved because of it."