I answer in english.
Really I doing this travel several times but I was referring to the distance from Spain(not Barcelona), the last time was 25 days ago, and I left from the Catalan Pyrenees near Andorra, and from there, it is approximately 1200kms. Another times I did the travel from the Basque Country in Hendaye-Irun, there are 1100kms approximately.
On the other hand 80-100kms every day are easy to doing , cycling at an average of 18-20 km / h you can do it in 5-6 hours, but even cycling at 10 km / h. very very slowly, you can do 80kms per day in 8 hours of a long summer day.
Groeten,
Indurain99.