Fernando Alonso put the Ferrari F150 on top of the times in the second day of testing in front of thousands of his fans in Valencia.
Team mate Felipe Massa takes over the car tomorrow.
Sebastian Vettel was second fastest ahead of Paul di Resta.
The Force India driver completed the most laps – 111 – and brought the red flags out early on after spinning at turn two.
Another early interruption came after Rubens Barrichello experienced an electrical failure on his Williams.
Jaime Alguersuari had a spin in his Toro Rosso but was able to return to the track and later handed his car over to Sebastian Buemi.
Barrichello also shared driving duties with Pastor Maldonado.
Red Bull divided the running between their two drivers as well but Mark Webber only made it out onto the track 40 minutes before the session ended.
His running was interrupted by Buemi, whose Toro Rosso came to a halt just after the pit lane entrance with quarter of an hour left to run. The session restarted with eight minutes left.
Power steering problems in the new Lotus T128 limited Heikki Kovalainen to just 15 laps. Mike Gascoyne said the team are flying the part back to Britain overnight for repairs.
|1||Fernando Alonso||Ferrari F150||1’13.307||108|
|2||Sebastian Vettel||Red Bull-Renault RB7||1’13.614||43||0.307|
|3||Paul di Resta||Force India-Mercedes VJM03||1’13.844||111||0.537|
|4||Lewis Hamilton||McLaren-Mercedes MP4-25||1’14.353||83||1.046|
|5||Robert Kubica||Renault R31||1’14.412||104||1.105|
|6||Narain Karthikeyan||HRT-Cosworth F110||1’14.472*||80||1.165|
|7||Nico Rosberg||Mercedes W02||1’14.645||69||1.338|
|8||Timo Glock||Virgin-Cosworth VR-01||1’15.408||34||2.101|
|9||Rubens Barrichello||Williams-Cosworth FW33||1’16.023||50||2.716|
|10||Sergio Perez||Sauber-Ferrari C30||1’16.198||42||2.891|
|11||Pastor Maldonado||Williams-Cosworth FW33||1’16.266||29||2.959|
|12||Sebastien Buemi||Toro Rosso-Ferrari STR6||1’16.359||46||3.052|
|13||Jaime Alguersuari||Toro Rosso-Ferrari STR6||1’16.474||64||3.167|
|14||Mark Webber||Red Bull-Renault RB7||1’17.365||17||4.058|
|15||Heikki Kovalainen||Lotus-Renault T128||1’20.649||15||7.342|
*It is believed the timing system reported Karthikeyan’s best time incorrectly. HRT have not issued a best time of the day for Karthikeyan.
2011 F1 testing
- Young Drivers Test Day 3 in pictures
- Vergne completes third day on top in Abu Dhabi
- Young Drivers Test Day 2 in pictures
- Vergne stays quickest on second day of test
- Italian F3 pair complete Ferrari test
- Jean-Eric Vergne leads first day of young drivers test
- McLaren cover least test distance with new car
- Rosberg: Mercedes are “on the up”
- Second Barcelona test day 5 in pictures
- Hamilton: reliability and pace concerns for McLaren