Iannone lebih cepat dari duo Repsol Honda. Marc Marquez menjadi tercepat kedua dengan catatan terbaik 1 menit 42,079 detik. Sementara Dani Pedrosa di urutan ketiga dengan 1 menit 42,210 detik.
Pebalap Movistar Yamaha, Valentino Rossi, menjadi tercepat keempat. Sementara rekan satu timnya, Jorge Lorenzo, terceccer di urutan ke-8.
Para pebalap selanjutnya menjalani sesi kualifikasi untuk menentukan posisi start balapan. Pedrosa dan Iannone harus memulai dari sesi kualifikasi pertama untuk menjadi dua terbaik yang bisa ambil bagian pada sesi kualifikasi kedua.
Berikut hasil sesi latihan bebas keempat GP Catalunya.
1. Andrea Iannone ITA Ducati Team (Desmosedici GP15) 1m 41.959s [Lap 4/13] 347km/h (Top Speed)
2. Marc Marquez ESP Repsol Honda Team (RC213V) 1m 42.079s +0.120s [3/15] 347km/h
3. Dani Pedrosa ESP Repsol Honda Team (RC213V) 1m 42.210s +0.251s [4/13] 343km/h
4. Valentino Rossi ITA Movistar Yamaha MotoGP (YZR-M1) 1m 42.459s +0.500s [6/15] 335km/h
5. Andrea Dovizioso ITA Ducati Team (Desmosedici GP15) 1m 42.495s +0.536s [9/14] 343km/h
6. Aleix Espargaro ESP Team Suzuki Ecstar (GSX-RR) 1m 42.528s +0.569s [3/13] 334km/h
7. Scott Redding GBR Estrella Galicia 0,0 Marc VDS (RC213V) 1m 42.559s +0.600s [4/15] 339km/h
8. Jorge Lorenzo ESP Movistar Yamaha MotoGP (YZR-M1) 1m 42.560s +0.601s [4/12] 337km/h
9. Cal Crutchlow GBR CWM LCR Honda (RC213V) 1m 42.673s +0.714s [10/14] 345km/h
10. Maverick Viñales ESP Team Suzuki Ecstar (GSX-RR)* 1m 42.687s +0.728s [8/13] 334km/h
11. Stefan Bradl GER Athina Forward Racing (Forward Yamaha) 1m 42.760s +0.801s [11/14] 335km/h
12. Yonny Hernandez COL Octo Pramac Racing (Desmosedici GP14.2) 1m 42.823s +0.864s [3/13] 342km/h
13. Danilo Petrucci ITA Octo Pramac Racing (Desmosedici GP14.1) 1m 42.902s +0.943s [10/13] 339km/h
14. Pol Espargaro ESP Monster Yamaha Tech 3 (YZR-M1) 1m 42.916s +0.957s [3/14] 339km/h
15. Loris Baz FRA Athina Forward Racing (Forward Yamaha)* 1m 43.091s +1.132s [10/13] 329km/h
16. Bradley Smith GBR Monster Yamaha Tech 3 (YZR-M1) 1m 43.233s +1.274s [5/15] 339km/h
17. Nicky Hayden USA Aspar MotoGP Team (RC213V-RS) 1m 43.529s +1.570s [8/9] 330km/h
18. Hector Barbera ESP Avintia Racing (Desmosedici GP14 Open) 1m 43.650s +1.691s [6/14] 340km/h
19. Eugene Laverty IRL Aspar MotoGP Team (RC213V-RS)* 1m 43.750s +1.791s [9/9] 331km/h
20. Karel Abraham CZE Cardion AB Motoracing (RC213V-RS) 1m 43.852s +1.893s [2/2] 329km/h
21. Alvaro Bautista ESP Factory Aprilia Gresini (RS-GP) 1m 43.948s +1.989s [4/14] 334km/h
22. Jack Miller AUS CWM LCR Honda (RC213V-RS)* 1m 44.159s +2.200s [9/13] 332km/h
23. Mike Di Meglio FRA Avintia Racing (Desmosedici GP14 Open) 1m 44.428s +2.469s [6/13] 335km/h
24. Alex De Angelis RSM E-Motion IodaRacing (ART) 1m 44.687s +2.728s [9/11] 326km/h
25. Marco Melandri ITA Factory Aprilia Gresini (RS-GP) 1m 45.195s +3.236s [5/13] 331km/h
Fastest practice time:
Maverick Vinales SPA Suzuki 1m 41.105s (FP3)
Official Catalunya MotoGP records:
Best lap:
Dani Pedrosa SPA Honda 1m 40.893s (2013)
Fastest race lap:
Marc Marquez SPA Honda 1m 42.182s (2014)