Distances are always subjective. The same distance Mountain Biking requires more energy, time and fitness than road Cycle Touring. In the Iberia it is rare when climbs are too long or steep.

A normal day will include 4 to 6 hours biking. Those who are faster may take less time.
There will be plenty of time to be among locals, sightseeing, shopping, and to have a Bica (tasty espresso coffee) or Imperial (glass of beer) on a terrace!