Graham Turner has spoken to BBC Hereford and Worcester ahead of Saturday's match.
With the club's level on points, Turner believes the Bulls can match their big spending rivals: "We've got every confidence we can do it, we can live with the good sides and we can cause anybody problems. It's a test, it's a challenge, that's what we throw out to the players.
"They can go out and sign, by our standards, almost anybody they want. These big money spenders, let's go and show them we can live with them, and that's what the aim has got to be on Saturday."
The bookies are less confident of a positive result for the Bulls at London Road, with The Posh 10/11 favourites and the Bulls 10/3. The draw is 12/5. The Bulls are not expected to be big scorers in the game with Trevor Benjamin only an 8/1 shot, along with the 'no goalscorer' bet, to get the first goal. Four Posh players are ahead of him in the list including ex-non league trio Aaron McLean, Craig Mackail-Smith, and George Boyd.