TS is a great engine but its lagging behind on fuel consumption somewhat. Alfa tried to address this with the JTS but killed the character of the engine.
The 2L TS is a great engine in the 156 and GTV, it felt dead in the GT/147, why that is I don't know, maybe weight or maybe it was remapped in an attempt to address the consumption.
My first GTV TS had a power band at 4k rpm, it was impossible to drive it slowly as you always revved for that power band, probably why they ate the fuel I suppose. Remove the power band, kill the engine but improve the consumption.