ICEBERG USA GRAND PRIX - PRACTICE 1
10 Mar 1991
Phoenix Street Circuit, United States
| Pos. | No. | Driver | Team | Time / Gap |
|---|---|---|---|---|
| 1 | 1 | Ayrton SennaSEN | McLaren Honda | 1:23.525 |
| 2 | 27 | Alain ProstPRO | Ferrari | +0.967s |
| 3 | 5 | Nigel MansellMAN | Williams Renault | +1.525s |
| 4 | 28 | Jean AlesiALE | Ferrari | +1.753s |
| 5 | 19 | Roberto MorenoMOR | Benetton Ford | +1.889s |
| 6 | 20 | Nelson PiquetPIQ | Benetton Ford | +2.170s |
| 7 | 4 | Stefano ModenaMOD | Tyrrell Honda | +2.211s |
| 8 | 6 | Riccardo PatresePAT | Williams Renault | +2.357s |
| 9 | 2 | Gerhard BergerBER | McLaren Honda | +2.441s |
| 10 | 21 | Emanuele PirroPIR | Dallara Judd | +2.547s |
| 11 | 22 | Jyrki JarvilehtoJAR | Dallara Judd | +3.167s |
| 12 | 3 | Satoru NakajimaNAK | Tyrrell Honda | +3.342s |
| 13 | 29 | Eric BernardBER | Lola Ford | +3.760s |
| 14 | 32 | Bertrand GachotGAC | Jordan Ford | +3.862s |
| 15 | 23 | Pierluigi MartiniMAR | Minardi Ferrari | +4.168s |
| 16 | 7 | Martin BrundleBRU | Brabham Yamaha | +4.748s |
| 17 | 11 | Mika HakkinenHAK | Lotus Judd | +4.869s |
| 18 | 8 | Mark BlundellBLU | Brabham Yamaha | +5.516s |
| 19 | 17 | Gabriele TarquiniTAR | AGS Ford | +5.750s |
| 20 | 18 | Stefan JohanssonJOH | AGS Ford | +5.857s |
| 21 | 34 | Nicola LariniLAR | Lambo Lamborghini | +5.859s |
| 22 | 30 | Aguri SuzukiSUZ | Lola Ford | +6.057s |
| 23 | 9 | Michele AlboretoALB | Footwork Porsche | +6.364s |
| 24 | 10 | Alex CaffiCAF | Footwork Porsche | +6.572s |
| 25 | 25 | Thierry BoutsenBOU | Ligier Lamborghini | +6.752s |
| 26 | 15 | Mauricio GugelminGUG | Leyton House Ilmor | +7.121s |
| 27 | 26 | Erik ComasCOM | Ligier Lamborghini | +8.256s |
| 28 | 24 | Gianni MorbidelliMOR | Minardi Ferrari | +10.947s |
| 29 | 12 | Julian BaileyBAI | Lotus Judd | +11.344s |
| 30 | 16 | Ivan CapelliCAP | Leyton House Ilmor | +30.703s |