| Year | Distance | Guðmundur Ágústsson | Sigurður Gunnarsson | Ratio |
|---|---|---|---|---|
| 1987 | 21 | 01:27:31 | 01:10:12🏅 | 80% |
| 1988 | 21 | 01:26:34 | 01:10:33🏅 | 81% |
| 1989 | 21 | 01:24:59 | 01:08:54🏅 | 81% |
| 2005 | 20 | 02:10:22 | 01:24:58🏅 | 65% |
| 2006 | 20 | 01:50:10 | 01:15:11🏅 | 68% |
| 2008 | 20 | 02:03:10 | 01:20:41🏅 | 66% |
| 2009 | 20 | 01:54:30 | 01:26:57🏅 | 76% |
| 2011 | 20 | 01:44:58 | 01:16:25🏅 | 73% |
| 8 races | 0 🏅 | 8 🏅 |
Here you can find a list of other arch-rivals, that is those with most races in common (same year and distance). Click to see detailed comparison.