Ferrari's Fernando Alonso topped the timesheets on the second day of testing at Valencia, his 1:13.307 eclipsing the best time posted yesterday by Sebastian Vettel.

The Spaniard continued with development of the F150, concentrating mainly on acquiring data which will be used to analyse the aerodynamic behaviour of the car, as well as gaining a further understanding of the Pirelli tyres. He covered 108 laps on his way to posting a best time of 1.13.307.

"I am happy with the work we did today," said Alonso. "Yesterday we concentrated mainly on the systems on the car, on checking that everything was okay, while on this second day we were able to go deeper into our understanding of its behaviour, even with different fuel loads, making the first changes to the set-up. For example, we tried to deal with the oversteer and to find ways of dealing with tyre degradation over a long distance."

A few minor hitches linked to carrying out some set-up changes on the car slowed the work programme in the morning, but it did not upset the planned programme which was fully completed. "This is totally normal when you start developing a brand new car," explained Alonso. "From the reliability point of view, this is definitely a good start. The F150 proved to be very strong and we can be happy about that. As to whether we will be competitive, we won't really know for sure until Bahrain."

Felipe Massa was a keen observer and tomorrow, it is his turn to get behind the wheel of the F150. In the morning, his team-mate is heading off for Maranello where, the next day, he will be working on the simulator.

At Red Bull, Sebastian Vettel and Mark Webber split the driving duties, with the German driving in the morning, before the Australian took over for the afternoon. The team continued with further system checks, as well as focusing on aerodynamic development work.

"I didn't get so long in the car today," said Webber, "so we will start the real work tomorrow. There was a bit of a problem with the installation, something with the pedals, so it took a bit longer than we expected. It wasn't the smoothest day, but we're back tomorrow - it's great that the guys have got the car here for the first test and I'm looking forward to driving it more."

"Sebastian pretty much ran to schedule this morning," added Head of Race Engineering, Ian Morgan, "there were a few minor delays, but nothing significant. Unfortunately we lost some time changing drivers this afternoon due to some driver installation issues. Once Mark's testing session got underway, he was able to complete two runs and begin acclimatising to the new car."

Paul di Resta continued Force India's programme , completing more than 100 laps of the 3.92km Spanish track. The Scot, driving the 2010 car, contributed to an extremely productive day as he gathered more information on the performance of the three Pirelli tyre compounds available this week. His fastest lap, a 1:13.844, was the third quickest of the day.

"Another good day of testing for the team," said the Scot, "gathering lots of information for the guys to work on as we prepare for the debut of the VJM04 next week. We're now understanding a lot more about the performance of the Pirellis and the differences between the compounds, particularly with regards to long and shorter runs and different fuel loads. At this stage we're not going for times, just trying to get representative data to work on. I'm feeling good and well integrated into the team and my new role, there's a really positive atmosphere, which will set us up extremely well for next week when the new car testing programme starts."