RWT Shiraz was launched in May 2000 with the 1997 vintage. Its style is opulent and fleshy, contrasting with Grange, which is more muscular and assertive. RWT is made from fruit primarily selected for its aromatic qualities and fine texture rather than sheer intensity or power of flavour. The result is a wine that redefines Barossa Shiraz at the highest quality level.

The development of Penfolds Red Winemaking Trial (RWT) reflects extraordinary progress in viticulture and winemaking. The two disciplines are increasingly intertwined, as growers and winemakers work together in search of optimum balance, ripeness and flavour.