400 m, Men
| Competition | 1991 South American Athletics U20 Championships |
|---|---|
| Venue |
Asuncion
 PAR
|
| Held | — |
| Status | Medal |
| Competitors | 4 |
| Countries | 3 |
| Pos | Athlete(s) | Country | Mark | ||
|---|---|---|---|---|---|
| 🥇 | Sanderlei Parrela |  BRA |
48.6 | ||
| 🥈 | Sebastián Keitel |  CHI |
48.8 | ||
| 🥉 | Julio Caballero | PAR |
49.6 | ||
| 🥉 | Rogerio Da Silva | BRA |
49.6 |