Debutants
Miguel Ángel Sánchez is the youngest debutant in Volta a Portugal in 1991. There are 26 debutants.
| # | Rider | Team | Age |
|---|---|---|---|
| 1 | SÁNCHEZ Miguel Ángel | Seur | 21y + 136d |
| 2 | PEIXOTO Manuel | Quintanilha | 21y + 176d |
| 3 | MIRANDA Carmelo | Artiach - Royal | 21y + 227d |
| 4 | RODRIGUES Orlando Sergio | Ruquita - Philips | 21y + 287d |
| 5 | PEREIRA Rui | Quintanilha | 21y + 302d |
| 6 | PAULO OLIVEIRA Mario | Orima | 22y + 332d |
| 7 | GOMES MARTINS Carlos | Soberana Corticeira - Carnide | 23y + 52d |
| 8 | GARCÍA Federico | Seur | 23y + 194d |
| 9 | AUGUSTO RAMIREZ Cesar | Quintanilha | 23y + 261d |
| 10 | ZUBOV Andrei | Lotus - Festina | 24y + 38d |
| 11 | PIÑERO Fernando | Lotus - Festina | 24y + 163d |
| 12 | RODRÍGUEZ Fabio Hernan | Pony Malta - Avianca | 24y + 317d |
| 13 | RONCANCIO Celio Roberto | Pony Malta - Avianca | 25y + 145d |
| 14 | RAMÍREZ Dubán Alberto | Pony Malta - Avianca | 25y + 217d |
| 15 | GONZALEZ Luis Alberto | Pony Malta - Avianca | 26y + 8d |
| 16 | VINCENTE DIAZ Jose | Quintanilha | 26y + 204d |
| 17 | DE LA CRUZ Roque | Seur | 26y + 234d |
| 18 | CARRENO Marco Antonio | Pony Malta - Avianca | 26y + 239d |
| 19 | LOZANO Alvaro | Pony Malta - Avianca | 27y + 82d |
| 20 | LLACH Joaquin | Artiach - Royal | 27y + 188d |
| 21 | CUSPOCA Demetrio | Pony Malta - Avianca | 27y + 249d |
| 22 | SANCHIS José Salvador | Seur | 28y + 131d |
| 23 | CORREDOR Edgar | Sicasal - Acral | 31y + 161d |
| 24 | LOGVIN Oleg | Ruquita - Philips | 32y + 73d |
| 25 | SÁNCHEZ Mariano | Artiach - Royal | 32y + 184d |
| 26 | TOLOSA Rafael | Pony Malta - Avianca | 32y + 346d |