Οι περισσότερες ομάδες έμειναν στην πίστα της Jerez και πραγματοποίησαν δοκιμές ώστε να βελτιωθούν στους τομείς που υστερούν και να γίνουν ακόμα πιο ανταγωνιστικές.

Oι χρόνοι της Τρίτης (1/4)
1. Nicky Hayden USA Repsol Honda Team (M) 1:38.940
2. Dani Pedrosa SPA Repsol Honda Team (M) 1:40.099
3. Chris Vermeulen AUS Rizla Suzuki MotoGP (B) 1:40.184
4. Loris Capirossi ITA Rizla Suzuki MotoGP (B) 1:40.776
5. Olivier Jacque FRA Kawasaki Test Rider (B) 1:41.852
6. William Costes FRA Michelin/Yamaha Test Rider (M) 1:42.581

Oι χρόνοι της Δευτέρας (31/3)
1. Jorge Lorenzo SPA Fiat Yamaha Team (M) 1:38.679
2. Valentino Rossi ITA Fiat Yamaha Team (B) 1:39.117
3. Casey Stoner AUS Ducati Marlboro Team (B) 1:39.218
4. Randy de Puniet FRA LCR Honda MotoGP (M) 1:39.484
5. John Hopkins USA Kawasaki Racing Team (B) 1:39.569
6. Loris Capirossi ITA Rizla Suzuki MotoGP (B) 1:39.747
7. Shinya Nakano JPN San Carlo Honda Gresini (B) 1:40.034
8. Dani Pedrosa SPA Repsol Honda Team (M) 1:40.116
9. Nicky Hayden USA Repsol Honda Team (M) 1:40.389
10. Andrea Dovizioso ITA JiR Scot Team (M) 1:40.394
11. Chris Vermeulen AUS Rizla Suzuki MotoGP (B) 1:40.534
12. Alex de Angelis RSM San Carlo Honda Gresini (B) 1:41.308
13. Μarco Melandri ITA Ducati Marlboro Team (B) 1:41.396
14. Anthony West AUS Kawasaki Racing Team (B) 1:42.132
15. Τoni Elias SPA Alice Team (B) 1:42.240
16. Olivier Jacque FRA Kawasaki Test Rider (B) 1:42.562
17. Sylvain Guintoli FRA Alice Team (B) 1:42.624

2008 Spanish Grand Prix:
Pole position: Jorge Lorenzo SPA Fiat Yamaha (M) 1:38.189

Tαχύτερος γύρος ανά κατασκευαστή:
Honda: Dani Pedrosa SPA Repsol Honda (M) 1:40.116
Yamaha: Valentino Rossi ITA Fiat Yamaha (B) 1:40.192
Suzuki: Loris Capirossi ITA Rizla Suzuki (B) 1:40.402
Kawasaki: John Hopkins USA Kawasaki Racing (B) 1:41.336
Ducati: Casey Stoner AUS Ducati Marlboro (B) 1:41.386