Tawny Porto has a lot of body, and its finish gracefully slides down the throat. It features an aroma of walnuts. They taste a lot better than ruby ports but don't cost as much as vintage ports.
Tawny port is drinkable right now.
Here is a quick primer. Ruby port is the youngest and least expensive. It is aged in wood for two years and, when bottled, is ready to drink. It does not age in the bottle. It is young and fruity.