Crouch's former employers have finally found their rhythm, taking 17 points from a seven-game unbeaten run to sit behind Chelsea, Manchester United and Arsenal in the Premier League.
Tottenham, who face Wolves on Wednesday, are just a point behind the Reds, who play the Gunners.
Frustrated: Crouch (front) could not find a way past Aston Villa on Saturday
'The previous seasons don't lie. They have always been in the Champions League,' said England striker Crouch.
'They had a blip at the start of the season and people said other people can get in there but, if I'm honest, if you want to get in the Champions League then Liverpool will be the toughest side to displace. We have to make sure we are in there and in a position to do that.
'There was an opportunity earlier in the season. We had a couple of draws and it was frustrating we couldn't pull away more. But I still feel we have enough ability.
'You look around the dressing room at the players who aren't playing and there is so much quality here. I still believe we have a real opportunity.
'Saturday (goalless draw with Aston Villa) wasn't a must-win game because there are enough games before the end of the season but we're pleased not to lose it. Manchester City lost and Liverpool won so it was important not to lose. We deserved to win it.
'You think one team is cementing fourth spot, then they lose and another team wins. It's going to be really tight until the end of the season, and we have to make sure we are close enough right to the end.
'But I believe we have enough quality. The manager strengthened in January with a couple of signings and I think we have enough ability. We have a big squad with international players who can come in and play in different positions. I'm sure we will be strong enough.'
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