Shortly after I'd bought the Ibiza - 3 cylinder - I had this strange feeling I'd heard something like it before. Then it dawned on me, when pulling hard, it sounds almost exactly like the V6 Dodge people carrier my daughter used to run around in when they lived in the States.Hmm.
I quite like a triple, I'd say ours sounds fairly similar to a six.
The only thing that comes to mind when I hear a TA is a 2cv..