de la Rosa's time in the restricted V10 was a 1:17.451.
Fisichella's time in a 2006 spec car was a 1:17.479.
de la Rosa covered the most number of laps with 123

For reference, the best time in 2005 was a 1:15.561 by Pedro de la Rosa in the McLaren MP4/20.

Several drivers had problems today, Kimi Raikkonen's running was very limited due to a gearbox problem and an engine oil leak. Both Nick Heidfeld and Jacques Villeneuve had problems with their BMW Saubers, Nico Rosberg suffered a steering hydraulics problem on his FW28 and Tiago Monteiro had a couple of problems on his MF1 Racing car.

The new Toro Rosso STR-01 took to the track for the first time with Antonio Liuzzi driving. Liuzzi's best time was over a second faster than Albers in the MF1 Racing car. The car had one electrical problem during the day.
In related news, Red Bull confirmed that Gerhard Berger has purchased a 50% stake in the Toro Rosso team.

Weather conditions were sunny then cloudy with air temperature reaching 19 degrees and track temperatures reaching 23 degrees.

Honda and Toyota have concluded their test. The remaining 6 teams continue testing tomorrow.

Day 1, Day 2, Day 3, Day 4

Best Lap Times and lap records at Testing Tracks

Formula 1 Team notes to follow

Jerez Test times
Driver	Team	Tyre	Best Lap	Number of Laps
Pedro de la Rosa	McLaren V10 (interim car)	M	1:17.451	123
Giancarlo Fisichella	Renault V8	M	1:17.479	76
Mark Webber	Williams V8	B	1:17.767	104
Jenson Button	Honda V8	M	1:17.990	118
Jacques Villeneuve	BMW Sauber V8	M	1:18.179	75
Nick Heidfeld	BMW Sauber V8	M	1:18.278	63
Heikki Kovalainen	Renault V8	M	1:18.542	45
Nico Rosberg	Williams V8	B	1:18.843	60
Kimi Raikkonen	McLaren V8	M	1:18.929	40
Jarno Trulli	Toyota V8	B	1:19.083	103
Ralf Schumacher	Toyota V8	B	1:19.320	107
Antonio Liuzzi	Toro Rosso	M	1:19.394	79
Christijan Albers	MF1 Racing (06 & interim car)	B	1:20.685	90
Tiago Monteiro	MF1 Racing (06 & interim car)	B	1:20.922	29