The final day of testing saw a dry track to the relief of many of the teams. Although the day started slightly damp, a dry line quickly emerged on track and teams were able to complete their first day of fruitful running of the week.
Kazuki Nakajima emerged as the man to beat as he drove his Williams FW30 to the fastest lap of the day, just three hundredths of a second faster than the McLaren of Heikki Kovalainen, with the second McLaren of Pedro de la Rosa just a further two hundredths behind the Finn.
The session was marred by seven red flags. One was caused by Ferrari driver Felipe Massa as he spun out on track. Kovalainen and Webber caused two red flags apiece when they stopped out on track, with Alonso also stopping out on track once. The remaining red flag was caused by Timo Glock when he spun.
Unofficial Test Times (21/02/08)
Pos Driver Team Time Laps 1. Nakajima Williams-Toyota 1:22.153 32 2. Kovalainen McLaren-Mercedes 1:22.185 64 3. de la Rosa McLaren-Mercedes 1:22.208 92 4. Massa Ferrari 1:22.213 95 5. Rosberg Williams-Toyota 1:22.248 108 6. Webber Red Bull-Renault 1:22.477 81 7. Coulthard Red Bull-Renault 1:22.499 102 8. Badoer Ferrari 1:22.535 102 9. Alonso Renault 1:22.657 61 10. Glock Toyota 1:22.901 109 11. Piquet Renault 1:23.286 104 12. Kobayashi Toyota 1:24.132 56 13. Hulkenberg Williams-Toyota 1:24.222 59