Ferrari unconcerned by 'radical' rivals

The Maranello outfit appears to have adopted a more conservative approach with its new F150 compared to some other teams - with Renault and Red Bull Racing utilising more radical exhaust layouts and Toro Rosso using a twin-floor concept.

But despite its car being more standard, Ferrari technical director Aldo Costa thinks that being more on-the-edge with car design is no guarantee of success on the track.

"I think the fastest car will be the car that will have the best blend between aero performance, mechanical characteristics of the car, and reliability - so we have to see," Costa said on the final day of testing in Valencia.

"If you have done extreme solutions then maybe you are paying the penalty on other aspects. So you need to have a very balanced approach to have a fast and winning car."

Costa has reiterated that further aerodynamic developments are scheduled for the F150 ahead of the final tests in Barcelona and Bahrain.

"I think as I said at the launch of the car, we have done a certain step of development and we plan for a further development," he explained. "From the mechanical point of view, the car between here and Jerez will be almost complete, but from the aerodynamic point of view not. So there will be further evolutions."

He added: "We know what we have developed from the performance point of view in the winter. We have done quite good progress and we know what we have got in our hand to continue the development. So we think we are pushing as much as we can.

"But more than an extreme approach, we need to find a productive approach. We need to do lap times and find performance. In the end the lap time is the final answer, so we will see."