Raikkonen sets the pace at Barcelona

Ferrari driver Raikkonen posted a best time of 1:20.314 onboard the F60 to finish over half a second in front of his closest rival, Williams's Kazuki Nakajima.

Raikkonen's day, however, was cut short after a problem with the KERS cooling system. The Finn covered just 55 laps.

The Brawn GP team continued to show good form in their first public outing, with Rubens Barrichello setting the third fastest time after a total of 111 laps.

The Brazilian, who had not driven an F1 car since the end of the 2008 season, got his first taste of the BGP-001 after taking over from teammate Jenson Button.

Jarno Trulli had another solid day for Toyota, completing 121 laps on his way to the fourth quickest time of the day, ahead of Red Bull's Mark Webber and BMW's Sauber Nick Heidfeld.

"Today was my last day of testing for the winter," said Trulli. "We again did a lot of laps including some interesting long runs as we finalised our preparations for Melbourne.

"It's clear we will only find out the true picture in Australia but I'm happy with our work in the course of the tests we've done. The car has been competitive and consistent so we can head into the first race with confidence. I feel ready."

Renault's Fernando Alonso had a low-key session, finishing down in eighth position.

"It was another good day for us, again covering lots of laps as we continue to get ready for the start of the season later this month," he said.

"The track conditions were good and we tried lots of things with the set-up, which has given us lots of useful data to look through tonight. We also worked on the aero and mechanical balance of the car with some interesting results. "

McLaren also had a discreet day, with Heikki Kovalainen again near the bottom of the times after 88 laps.

"We are running through a big programme in Barcelona this week," said McLaren Racing managing director Jonathan Neale. "Not only have we introduced a new series of aerodynamic components to MP4-24 but we have also been working on the car's set-up and balance over longer runs as well as rehearsing our pitstop procedures.

"It's been a very productive few days with Heikki in the car and we are hoping for an equally satisfactory conclusion to the week when Lewis takes to the track tomorrow."

The Toro Rosso team, who unveiled their new car yesterday, had a poor outing this time out, with Sebastien Bourdais managing just 14 laps before the STR4 suffered a problem with the front suspension.

The team were unable to solve it without the arrival of new parts from the factory back in Faenza.

Teammate Sebastien Buemi took over in the afternoon, but the Swiss completed only six laps, bringing Toro Rosso's total to a disappointing 20 for the whole session.

Today's times:

Pos  Driver        Team                       Time     Laps
 1.  Raikkonen     Ferrari              (B)  1:20.314   55
 2.  Nakajima      Williams-Toyota      (B)  1:20.907   66
 3.  Barrichello   Brawn-Mercedes       (B)  1:20.966  111
 4.  Trulli        Toyota               (B)  1:21.182  121
 5.  Webber        Red Bull-Renault     (B)  1:21.347   66
 6.  Heidfeld      BMW-Sauber           (B)  1:21.615  127
 7.  Sutil         Force India-Mercedes (B)  1:21.834   82
 8.  Alonso        Renault              (B)  1:21.937  111
 9.  Kovalainen    McLaren-Mercedes     (B)  1:21.991   88
10.  Bourdais      Toro Rosso-Ferrari   (B)  1:23.039   14
11.  Buemi         Toro Rosso-Ferrari   (B)  no time     6

All Timing Unofficial