| Final | time | | | 1. Manfred Matuschewski |  GDR | 1:45.9 | CR NR | | 2. Franz-Josef Kemper |  FRG | 1:46.0 | | | 3. Bodo Tümmler | FRG | 1:46.3 | | | 4. Chris Carter |  GBR | 1:46.3 | NR | | 5. Tomás Jungwirth |  TCH | 1:46.7 | NR | | 6. John Boulter | GBR | 1:47.0 | | | 7. Alberto Esteban |  ESP | 1:47.4 | NR | | 8. Noel Carroll |  IRL | 1:47.9 | |
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| History Men 800m. -- Competitors from -- Nations. Venue: Nepstadion. |
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Semi-Finalls -Saturday 03.09 | | First 4 progress to Final. |
| Semi 1 | time | | | 1. Franz-Josef Kemper | FRG | 1:47.9 | Q | | 2. Tomás Jungwirth | TCH | 1:48.0 | Q | | 3. Chris Carter | GBR | 1:48.1 | Q | | 4. Noel Carroll | IRL | 1:48.3 | Q | | 5. Vadim Mikhailov |  URS | 1:48.7 | | | 6. Mathias Seidler | GDR | 1:48.8 | | | 7. Guy Taillard |  FRA | 1:49.2 | | | 8. Maurice Lurot | FRA | 1:49.9 | |
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| Semi 2 | time | | | 1. Manfred Matuschewski | GDR | 1:49.3 | Q | | 2. John Boulter | GBR | 1:49.4 | Q | | 3. Bodo Tümmler | FRG | 1:49.5 | Q | | 4. Alberto Esteban | ESP | 1:49.5 | Q | | 5. Rein Tölp | URS | 1:49.8 | | | 6. Pavel Penkava | TCH | 1:49.8 | | | 7. Jürgen May | GDR | 1:50.0 | | | 8. Jean-Michel Pellez | FRA | 1:51.8 | |
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Heats - Friday 02.09 | | First 3 and Best 1 progress. |
| Heat 1 | time | | | 1. Mathias Seidler | GDR | 1:48.3 | Q | | 2. Franz-Josef Kemper | FRG | 1:48.4 | Q | | 3. Jean-Michel Pellez | FRA | 1:48.6 | Q | | 4. Derek McCleane | IRL | 1:48.6 | | | 5. Arne Kvalheim |  NOR | 1:49.4 | | | 6. Petr Blaha | TCH | 1:49.9 | | | 7. Marnix Cocquyt |  BEL | 1:53.7 | |
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| Heat 2 | time | | | 1. Jürgen May | GDR | 1:48.1 | Q | | 2. Guy Taillard | FRA | 1:48.1 | Q | | 3. Pavel Penkava | TCH | 1:48.2 | Q | | 4. John Boulter | GBR | 1:48.4 | q | | 5. Jacques Pennewaert | BEL | 1:48.4 | | | 6. Franco Arese |  ITA | 1:49.6 | | | 7. Imre Nagy |  HUN | 1:50.4 | |
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| Heat 3 | time | | | 1. Chris Carter | GBR | 1:48.7 | Q | | 2. Tomás Jungwirth | TCH | 1:48.9 | Q | | 3. Rein Tölp | URS | 1:49.1 | Q | | 4. Hansruedi Mumenthaler |  SUI | 1:49.3 | | | 5. Lorant Stoll | HUN | 1:50.3 | | | 6. Heikki Pippola |  FIN | 1:51.7 | | | 7. Gani Alia |  ALB | 1:52.4 | NR | | -. Paul Roekaerts | BEL | DQ | |
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| Heat 4 | time | | | 1. Noel Carroll | IRL | 1:48.1 | Q | | 2. Alberto Esteban | ESP | 1:48.2 | Q | | 3. Vadim Mikhailov | URS | 1:48.4 | Q | | 4. Walter Adams | FRG | 1:48.8 | | | 5. Kenth Andersson |  SWE | 1:49.0 | | | 6. Erik Zelazny |  POL | 1:50.2 | | | 7. Konstantinos Mihailidis |  GRE | 1:51.9 | | | 8. Jože Međimurec |  YUG | 1:53.5 | |
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| Heat 5 | time | | | 1. Bodo Tümmler | FRG | 1:48.6 | Q | | 2. Maurice Lurot | FRA | 1:48.8 | Q | | 3. Manfred Matuschewski | GDR | 1:48.9 | Q | | 4. Rudolf Klaban |  AUT | 1:49.0 | | | 5. Remir Mitrofanov | URS | 1:49.2 | | | 6. Preben Glue |  DEN | 1:50.2 | | | 7. Ian Hamilton | IRL | 1:53.7 | |
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