Rosberg predicts strong showing

Although the team have had mixed fortunes this year, taking a podium in Australia but suffering a disaster in Malaysia with their FW30 not working on Sepang's asphalt type, Rosberg believes that the Barcelona event will allow them to show the kind of pace that has seen them emerge as contenders for the fourth best team in F1.

"I'm looking forward to this weekend's Spanish Grand Prix because we know the circuit well as we've done a lot of testing there in the past," said Rosberg in a team preview.

"The car performed well at Catalunya throughout winter testing, so it should run well in the race. We had a promising test there last week; I had two day's preparation time with the car which should stand us in good stead for the race.

"The only difficulty with Barcelona is that track conditions are constantly changing so you're frequently having to adjust your set-up. Malaysia is now firmly behind us and I'm hoping we'll come away from next weekend with a positive result."

Williams joined other teams in evaluating development updates at last week's Barcelona test and technical director Sam Michael is hoping the team can challenge for more points.

"With the cars demonstrating good reliability now, our target for Barcelona is to continue improving our performance and getting points in order to build upon our position in the constructors' championship, but it will be a tough battle," he explained.