Benitez was delighted with the Blues' battling performance in the 2-1 win at Everton, as much for the way they scrapped to stay in the game when the hosts bossed the early stages.
And the Spaniard believes the same team spirit will be needed against Harry Redknapp's men.
"You could see the character of the players at Everton because in the first 25 minutes we were not in the game, but little by little we were controlling and creating chances," he said.
"We knew we could create even more and I was really pleased with the performance of the team.
"Obviously QPR are in a difficult position and that means they will be more dangerous.
"They are a team fighting to avoid relegation and that will be a totally different challenge.
"We have to carry on doing our job, trying to concentrate and focus on the things we are doing well and trying to improve the things we are not doing well.
"They are trying to do well so we will see what will happen, but for us it is about concentrating on our job."
Benitez has been credited with getting striker Fernando Torres scoring again but the manager has been impressed with the selfless work his compatriot is doing for the team.
"It is not easy for him to fight against two centre-backs but he creates space for (Juan) Mata and I think the understanding between the two is very good," said Benitez.
"He is doing a great job for the team. Sometimes it is not about just scoring goals, it is creating the space for other players."
Captain John Terry is still sidelined with a knee injury sustained in mid-November and so that avoids any awkwardness at Stamford Bridge when they come up against QPR.
Earlier this year, Terry was banned for four matches after being found guilty of racially abusing Rangers' defender Anton Ferdinand in an incident at Loftus Road in October 2011.
"John Terry is getting closer but we don't know how close," said Benitez.
"We have to wait and see every day when he is training the physios but I think the QPR game is too early for him."