That's around $2800 in USD, by the way. Is this new or used?
The Cervelo S1 might work, it depends a lot on your fitness, whether you're fit to it properly, and your tolerance to road buzz.
Depending on what's available, other bikes may be better suited for you on longer rides than the S1. Or, another way to put it: You likely don't need to spend 16000 NOK to get a bike that is good for centuries.