Tarrango is decidely a 20th century invention.  Created at an Australian research lab in an attempt to allow local vintners in Australia to produce wines in a more old world style (less fruit forward, higher acidity) Tarrango is a cross between Touriga Naccional and Sultana.  The result is a wine which ripens almost remarkebly slowly with high acidity and low tannins.  Most similar and patterned after Beaujolais Tarrango has simply never gained a solid footing with Australian wine drinkers, let alone those wine lovers in international markets.