I am hoping someone can help provide some details on the amount of Capital Gains Tax liability that would be due in Spain for the following;

Property purchased by a non resident (UK resident) in June 1986 for 4,900,000 Pesetas = 29,448 Euros

The property was sold for 150,000 Euros in March 2011.

As such what should the Capital Gains Tax liability be in Spain?

There may have been an option to purchase deed that was signed for 10,000 Euros.

If so, would the Capital Gains Tax liability calculation need to be based on a total sale price of 160,000 Euros?