Suárez netted a brace inside 15 minutes at Loftus Road to set the Reds on their way to a 3-0 victory over the Hoops, with Daniel Agger adding a third before half-time.
The Reds forward now has 13 Premier League goals to his name this term, with eight away from home – more than any other player this season.
And Allen was full of praise for his team-mate following Sunday’s win, which lifted Liverpool up to ninth place in the Premier League table.
“We were all desperate to bounce back after what was a bitterly disappointing result at Stoke,” Allen told the Liverpool Echo.
“We wanted to put things right and we did that with the way we played in the first half. As a team we were excellent and that’s the way we want to play in every match. When you’ve got someone like Luis Suárez you’re always going to cause teams problems. When Luis plays like that he’s unstoppable.
“For his first goal, when he picked up the ball I’m sure QPR didn’t think there was much danger.
“But he created something out of nothing and then produced a great finish. That’s why he’s a world-class striker. He’s scoring a lot of goals for us this season and long may that continue.”
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