Benjani is pushing to make his first start since rejoining Portsmouth.
Fratton Park boss Steve Cotterill has no new injury worries and has named the same starting line-up for the last two matches, picking up four points against Reading and Bristol City.
But striker Benjani has come on as a substitute in both games and hit a hat-trick in a midweek behind-closed-doors match to push his claims for a first Pompey start since January 2008.
New signing Erik Huseklepp made a lively six-minute cameo appearance against City but will probably be on the bench again.
Veteran defenders Hermann Hreidarsson and Christian Dailly are hoping to be added to the squad after missing out at Ashton Gate.
Cardiff may be handed a double boost for the trip with Filip Kiss and Aron Gunnarsson ready to return for the Bluebirds.
The duo have been struggling with injuries but both returned to full training this week and boss Malky Mackay is hoping he can call on their services.
Kiss, currently the Slovakian under-21 captain, has yet to feature since his loan move from Slovan Bratislava and Icelandic international Gunnarsson has missed the last three fixtures with an ankle problem picked up in the win over Bristol City.
Stephen McPhail is also nearing full fitness after missing all of the season thus far. He will not be available for the trip to the south coast but is likely to turn out for a Cardiff development team next Tuesday to regain match fitness.