Kết quả phiên chạy FP4 chặng đua MotoGP Aragon 2021:
| Stt | Tay đua | Xe | Km/h | Thời gian | Kh/cách |
| 1 | Marc MARQUEZ | Honda | 340.7 | 1’48.116 | |
| 2 | Enea BASTIANINI | Ducati | 341.8 | 1’48.264 | 0.148 / 0.148 |
| 3 | Francesco BAGNAIA | Ducati | 344.0 | 1’48.299 | 0.183 / 0.035 |
| 4 | Fabio QUARTARARO | Yamaha | 335.4 | 1’48.413 | 0.297 / 0.114 |
| 5 | Jack MILLER | Ducati | 340.7 | 1’48.446 | 0.330 / 0.033 |
| 6 | Takaaki NAKAGAMI | Honda | 341.8 | 1’48.458 | 0.342 / 0.012 |
| 7 | Jorge MARTIN | Ducati | 342.9 | 1’48.492 | 0.376 / 0.034 |
| 8 | Pol ESPARGARO | Honda | 339.6 | 1’48.497 | 0.381 / 0.005 |
| 9 | Joan MIR | Suzuki | 335.4 | 1’48.514 | 0.398 / 0.017 |
| 10 | Johann ZARCO | Ducati | 341.8 | 1’48.524 | 0.408 / 0.010 |
| 11 | Aleix ESPARGARO | Aprilia | 344.0 | 1’48.626 | 0.510 / 0.102 |
| 12 | Miguel OLIVEIRA | KTM | 336.5 | 1’48.692 | 0.576 / 0.066 |
| 13 | Cal CRUTCHLOW | Yamaha | 335.4 | 1’48.732 | 0.616 / 0.040 |
| 14 | Brad BINDER | KTM | 345.0 | 1’48.819 | 0.703 / 0.087 |
| 15 | Valentino ROSSI | Yamaha | 336.5 | 1’48.891 | 0.775 / 0.072 |
| 16 | Alex MARQUEZ | Honda | 339.6 | 1’48.913 | 0.797 / 0.022 |
| 17 | Iker LECUONA | KTM | 338.6 | 1’48.982 | 0.866 / 0.069 |
| 18 | Alex RINS | Suzuki | 339.6 | 1’49.148 | 1.032 / 0.166 |
| 19 | Danilo PETRUCCI | KTM | 334.4 | 1’49.159 | 1.043 / 0.011 |
| 20 | Maverick VIÑALES | Aprilia | 337.5 | 1’49.186 | 1.070 / 0.027 |
| 21 | Luca MARINI | Ducati | 339.6 | 1’49.231 | 1.115 / 0.045 |
| 22 | Jake DIXON | Yamaha | 331.3 | 1’49.676 | 1.560 / 0.445 |
Nguồn: Tổng hợp
