| Order / Lane | ATHLETE | COUNTRY | PB | SB 1983 | 
|---|---|---|---|---|
| Todd Bennett |  GBR | 46.39 | 46.39 | |
| Darren Clark |  AUS | 45.84 | 45.84 | |
| Michael Franks |  USA | 45.57 | 45.57 | |
| Michael Paul |  TTO | 46.33 | 46.33 | |
| Thomas Schönlebe |  GDR | 45.86 | 45.86 | |
| Ján Tomko |  TCH | 45.64 | 45.64 | |
| Hartmut Weber |  FRG | 44.72 | 45.74 | |
| Martin Weppler |  FRG | 46.12 | 46.12 | 
| Order / Lane | ATHLETE | COUNTRY | PB | SB 1983 | 
|---|---|---|---|---|
| Philip Brown |  GBR | 45.80 | 45.80 | |
| Bert Cameron |  JAM | 45.76 | 45.76 | |
| Douglas Hinds |  CAN | 46.62 | 46.62 | |
| Moses Kyeswa |  UGA | 46.31 | 46.31 | |
| Viktor Markin |  URS | 44.60 | 46.16 | |
| Sunder Nix |  USA | 44.68 | 46.19 | |
| Erwin Skamrahl |  FRG | 44.50 | 44.50 | |
| Gerson A. Souza |  BRA | 45.94 | 45.94 |