Red Bull's Helmut Marko says the team hopes to challenge Williams as Formula 1's third best team, with a raft of upgrades set to be introduced at this weekend's Spanish Grand Prix.
Most of the blame for the four-time champion outfit's struggles this season has been placed on engine supplier Renault, and the team has been striving to make up the deficit through aerodynamic innovation.
Major upgrades bearing the hallmarks of now part-time technical chief Adrian Newey are set to be introduced on the RB11 for Barcelona - including a new, ultra-short front nose - which Red Bull team adviser Helmut Marko believes will allow the team to take a step forward.
"[The package] should solve the problems we have had with the chassis and allow us to take a big leap in performance," Marko told Brazil's Globo.
"I think we will be able to fight with Williams - that is, of course, if Renault do their part as well."
Williams benefits from the benchmark Mercedes power unit, and Marko still believes that Red Bull is also reliant on Renault improving its engine for the team to climb the grid.
"I say only that we are doing our part," he said. "If we have a car with a good engine, it will allow us to fight, sometimes for the podium.
"Adrian is 100 per cent focused on the project," he added.