West Ham boss Allardyce big fan of Villa striker Benteke
Villa have struggled so far this season and currently languish 19th in the table, but Benteke has scored 10 league goals and Allardyce is aware the 22-year-old poses a huge threat to the Hammers.
"He's the biggest threat," Allardyce said.
"He's the man who scores the goals for Aston Villa on a regular basis, he's the focal point for their attacks in that he not only scores goals, but he holds the ball up, he's strong.
"He's had a fantastic start in what must have been a very disappointing season so far for Aston Villa.
"It says a lot for what he is as a player when he's producing what he is in a team that's been struggling for results."