These are the cars the Crvena Zastava factory made, and were directly based on the Fiat 128
https://sr.m.wikipedia.org/sr-ec/%D0...0%B2%D0%B0_128
https://en.m.wikipedia.org/wiki/Zastava_Skala
In 1979 they started production of a Bertone designed model under a new brand name: Yugo. The concept, size and category basically were copied from the Fiat 127.
The drivetrain was similar to the 128 clones except for the weakest model the Yugo 45 this used the Fiat 100 engine in 903 ccm form.
https://en.m.wikipedia.org/wiki/Yugo