Villa gained a crucial three points in their fight against relegation last weekend with victory at Reading, and the same result against Harry Redknapp's men would give them some breathing space.
Vlaar told the club's official website: "The fans were awesome at Reading, even after the conceded goal. They kept on yelling, screaming and shouting in a positive way. It was very good.
"We knew these two games were immense for us. This was a good start and we look forward to QPR now. Besides the previous two games against very good teams in Man City and Arsenal, we have had good results.
"That is what we have to do. We know we have to work hard and try to win games. It would be great to get the win."