The fourth stage was a 209 km road stage from Bristol to Swansea. It was a tough enough route, and the peleton were well over 8 minutes down on various groups throughout the stage, until near the end, when after being all together, it broke up again. Power finished 16th, moving him up to a very respectable 22nd overall. The others that remain finished, except for Quinn, who found the tough stage just too tough to finish.
| 1. | Raimondas Rumsas | Mroz | 4h39'10" |
| 2. | Jens Voigt | Credit Agricole | @ 06" |
| 16. | Ciaran Power | Ireland | @ 31" |
| 82. | Michael McNena | Ireland | @ 16'54" |
| 84. | Michael Fitzgerald | Ireland | @ 20'30" |
| DNF. | Padraig Quinn | Ireland | n/a |
| Overall G.C. | |||
| 1. | Benoit Joachim | US Postal | 15h14'45" |
| 2. | Marc Wauters | Rabobank | @ 02" |
| 22. | Ciaran Power | Ireland | @ 05'10" |
| 81. | Michael Fitzgerald | Ireland | @ 41'18" |
| 91. | Michael McNena | Ireland | @ 1h08'15" |