This is a car that is driven in a national class of the former Yugoslavia (now Serbia)
here was made under license from Fiat and called the flag (zastava)
here's a few pictures:
and wide body version:
but still can not find technical information on the engine
Judging by the pictures ...
dual carburetor 4-horn intakes (Weber Vergaser 45 DCOE)
somewhere around 160-180 hp maybe more
The fantastic Fiat 128 was produced in Argentina were they developed a "racing" aftermarket named "model iAVA 90cv" 1.300 cc, 5 speed gearbox and a 40/40 Weber horizontal carburetor. A few of those kits were used in the colombian assembled Fiat Colmotores 128 s and raced without success against Simcas 1.300 and very well customized Renaults 4 with 1.3 liters "poisoned" engines. Those Fiats were beautiful cars!