Rampf: Nothing separates top three

Nick Heidfeld and Robert Kubica have made the most of a step forward in pace from their Hinwil-based team's car this year, but have so far lacked the final bit of speed they need to beat Ferrari.

But Rampf thinks the fight between BMW Sauber, Ferrari and McLaren is so tight that small factors could swing it in one team's favour.

"The race in Barcelona showed the order at the top has not changed," said Rampf. "Ferrari still have the advantage, while McLaren Mercedes and the BMW Sauber F1 Team are practically on a par.

"It's so close that the slightest modification could swing the pendulum either way. That's why we are pushing our development forward at full speed."

BMW motorsport director Mario Theissen simply wants his team to maintain their position alongside McLaren and Ferrari at the front of the field in the next race in Turkey.

"Our targets for the Turkish Grand Prix are clear: we want to consolidate our position among the leaders, where Ferrari is currently the yardstick," he explained. "For the fifth race of the season we will be making detail improvements to the F1.08 again."