Lotus' Pic tests concept tyre as Bianchi impresses for Ferrari in place of Raikkonen.
The Williams driver finished six thousandths of a second ahead of Red Bull Racing’s Daniel Ricciardo.
Maldonado and Lotus lead as Barcelona test ends
Sebastian managed to put in a useful 72 laps of the Circuit de Catalunya in the afternoon.
Daniil Kvyat completed an aero test, involving straight line constant speed running, so plenty of “in” and “out” laps.
Susie Wolff performed some aero test work and control systems testing and team completed planned testing programme on schedule this morning.
Overall the team was very pleased with the outcome of the day.
Sahara Force India completed its Barcelona test today with local boy Daniel Juncadella completing 91 laps in the VJM07.
Maldonado was fastest in Barcelona Wednesday, ahead of Rosberg, who spent part of the day testing the controversial 'megaphone' exhaust.
Marussia's Max Chilton topped the charts in the opening day of testing in Spain.
Close to 2,000 km run for Renault-powered teams on opening day of practice for Spanish Grand Prix.
Mercedes paced the first and second days of April testing in Bahrain, with Lewis Hamilton getting to spend some time in the No. 1 spot on day two.
Felipe Nasr got the chance to drive a Williams in the second day of testing in Bahrain.
Red Bull's Daniel Ricciardo completed 67 laps on the second day of testing in Bahrain after electrical issues plagued the RB10 in the morning.
Sauber F1 Team completed second day of testing session at Sakhir
Jean-Eric Vergne done 64 laps with a best time of 1:35.557.
Increased performance gap between hard and medium, and medium and soft compounds.
Sebastian Vettel: "I'm happy today, we did a lot of laps, we learned a lot and it was a positive end to a tough week here."