PORTUGUESE GRAND PRIX - PRACTICE 1
23 Sep 1990
Autódromo do Estoril, Portugal
| Pos. | No. | Driver | Team | Time / Gap |
|---|---|---|---|---|
| 1 | 27 | Ayrton SennaSEN | McLaren Honda | 1:15.529 |
| 2 | 28 | Gerhard BergerBER | McLaren Honda | +0.346s |
| 3 | 6 | Riccardo PatresePAT | Williams Renault | +0.461s |
| 4 | 1 | Alain ProstPRO | Ferrari | +0.494s |
| 5 | 2 | Nigel MansellMAN | Ferrari | +0.564s |
| 6 | 19 | Alessandro NanniniNAN | Benetton Ford | +0.933s |
| 7 | 4 | Jean AlesiALE | Tyrrell Ford | +0.942s |
| 8 | 30 | Aguri SuzukiSUZ | Lola Lamborghini | +1.103s |
| 9 | 20 | Nelson PiquetPIQ | Benetton Ford | +1.139s |
| 10 | 23 | Pierluigi MartiniMAR | Minardi Ford | +1.775s |
| 11 | 3 | Satoru NakajimaNAK | Tyrrell Ford | +1.973s |
| 12 | 5 | Thierry BoutsenBOU | Williams Renault | +2.170s |
| 13 | 22 | Andrea de CesarisDEC | Dallara Ford | +2.453s |
| 14 | 12 | Martin DonnellyDON | Lotus Lamborghini | +2.687s |
| 15 | 11 | Derek WarwickWAR | Lotus Lamborghini | +2.893s |
| 16 | 8 | Stefano ModenaMOD | Brabham Judd | +2.946s |
| 17 | 26 | Philippe AlliotALL | Ligier Ford | +3.019s |
| 18 | 9 | Michele AlboretoALB | Arrows Ford | +3.313s |
| 19 | 10 | Alex CaffiCAF | Arrows Ford | +3.434s |
| 20 | 18 | Yannick DalmasDAL | AGS Ford | +3.600s |
| 21 | 15 | Mauricio GugelminGUG | Leyton House Judd | +3.816s |
| 22 | 24 | Paolo BarillaBAR | Minardi Ford | +3.923s |
| 23 | 25 | Nicola LariniLAR | Ligier Ford | +4.196s |
| 24 | 16 | Ivan CapelliCAP | Leyton House Judd | +5.102s |
| 25 | 14 | Olivier GrouillardGRO | Osella Ford | +5.125s |
| 26 | 21 | Emanuele PirroPIR | Dallara Ford | +5.146s |
| 27 | 7 | David BrabhamBRA | Brabham Judd | +5.180s |
| 28 | 31 | Bertrand GachotGAC | Coloni Ford | +5.432s |
| 29 | 17 | Gabriele TarquiniTAR | AGS Ford | +6.607s |
| 30 | 29 | Eric BernardBER | Lola Lamborghini | +6.976s |