I have a light Barbour for the Spring and Autumn and a well worn leather for colder weather.
For Nordkapp, I bought a 'weather proof' jacket from Screwfix and it kept me dry and warm for most of the trip. When it got very cold I added a few thermal layers and a Patagonia micro shell (of which I am now a convert - super thin, super warm but best of all tucks up into a very tiny bag, so can be easily stored away).
If I want/need to be smart, I can always wear a nice wool sports coat but even then, I can't imagine it being comfortable to drive in (and I wouldn't choose to do so)
