| Year | Distance | Halldór Margeirsson | Kristbjörn Róbert Sigurjónsson | Ratio |
|---|---|---|---|---|
| 1996 | 20 | 01:13:52🏅 | 01:37:15 | 132% |
| 1998 | 20 | 01:28:36🏅 | 01:46:23 | 120% |
| 1999 | 20 | 01:32:11🏅 | 01:38:57 | 107% |
| 2001 | 20 | 01:28:26 | 01:24:03🏅 | 95% |
| 2002 | 20 | 01:23:32 | 01:15:17🏅 | 90% |
| 2003 | 20 | 01:41:12 | 01:29:11🏅 | 88% |
| 2007 | 50 | 03:47:29 | 03:14:50🏅 | 86% |
| 2008 | 50 | 04:34:39 | 03:21:28🏅 | 73% |
| 2009 | 50 | 03:53:55 | 03:14:07🏅 | 83% |
| 2012 | 50 | 04:13:28 | 03:07:17🏅 | 74% |
| 2016 | 25 | 02:37:40 | 01:24:59🏅 | 54% |
| 11 races | 3 🏅 | 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.