BARCELONA - Germany's Sebastian Vettel was fastest in Tuesday's second day of Formula One testing at the Montmelo circuit near Barcelona.

Vettel's Red Bull car had a best lap of 1min 19.751sec, among the 70 he undertook, after a scare at one point with an explosion at the back of his car following brake and cooling fluid problems.

1. Sebastian Vettel (GER/Red Bull) 1min 19.751sec (70 laps),
2. Takuma Sato (JPN/Toro Rosso) 1:20.017 (79),
3. Sebastien Bourdais (FRA/Toro Rosso) 1:20.034 (48),
4. Sebastien Buemi (SUI/Toro Rosso) 1:20.223 (99),
5. Gary Paffett (ENG/McLaren) 1:21.340 (31),
6. Robert Kubica (POL/BMW) 1:21.521 (76),
7. Nico Rosberg (GER/Williams) 1:21.525 (113),
8. Jenson Button (GBR/Honda) 1:21.770 (110),
9. Adrian Sutil (GER/Force India) 1:22.073 (58),
10. Lucas Di Grassi (BRA/Honda) 1:22.283 (110)

11. Nelson Piquet Jr (BRA/Renault) 1:22.384 (85),
12. Luca Badoer (ITA/Ferrari) 1:22.425 (127),
13. Marc Gene (ESP/Ferrari) 1:22.772 (31),
14. Nick Heidfeld (GER/BMW) 1:22.945 (81),
15. Giedo van der Garde (NED/Renault) 1:23.250 (37),
16. Pedro de la Rosa (ESP/Force India) 1:23.499 (86)