Indeed, discussing the strikers he has worked with in the past, the BBC pundit said the QPR man was more of a Jermain Defoe than a Robbie Keane or Dimitar Berbatov. But he is most like Newcastle icon Shearer, the former midfielder believes.
Jenas referenced QPR's valuation of Austin at £15 million and believes he would be a 'snip' for that price.
And he told the BBC Sport website: "He is kind of like a throwback because not many forwards make the runs he makes anymore - they would rather be waiting on the edge of the area for a cut-back for a nice finish.
"Charlie is more like an old-school English striker who is prepared to hurt himself to score goals.
"He gets across defenders and the goalkeeper to get on the end of balls into the area like Alan Shearer did when I played with him at Newcastle."
Austin not Mitrovic?
Throughout the summer, the comparisons between Newcastle signing Aleksandar Mitrovic and Shearer have been plentiful. But the 20-year-old is yet to hit the ground running at St James' Park - and looks more like Roy Keane when he was confronting Shearer...
He may well come good but could the Magpies end up giving in and going for Austin once the transfer deadline draws closer?
Intriguingly, Manchester United's odds have been slashed on signing the QPR forward - but the bookies suggest Newcastle are still well in the running, according to Sky Bet.