The Fiat 131 Abarth Rally is the first Abarth that I remember. I remember it because it was driven by a fellow Finn Markku Alen in the rallies in the seventies when I was a youngster. It was exciting to watch the battles between 131's and Escort's in the rallies.
Only later I became familiar with the earlier Fiat 500 and 600 based track Abarth's.