Red Bull expecting 'signficant step' from 'massive' Barcelona upgrade

Red Bull expects to make a "significant step forward" with a "massive" upgrade due for the Spanish Grand Prix in Barcelona.

Red Bull has fallen short of pre-season expectations that F1's new rules, which have shifted focus back towards aerodynamics, would re-establish the team as title contenders. Instead it finds itself third in the pecking order and 55 points behind championship leader Ferrari, though the Bahrain Grand Prix suggested it has started to claw back some of its deficit to the front.

While some of that gap can be traced to Renault's early problems with its MGU-K, Red Bull's motorsport consultant Helmut Marko says the team's chassis is also to blame -- though he promises a…