in 89 vw had the fox,jetta,rabbit cars my question is.. are the motors the same?

[JonathanRansome]

my vw fox has the 1.8 inline 4 and every site that i go to has parts for the rabbit or the jetta but not for the fox and i need to know wat the diff is or if there is one at all

 

[OldManDirt]

My information says the same engine was used in the Golf, Jetta, Rabbit, and Scirocco (engine codes JH, MZ) 1982-89
However there was a different engine used in the 89 Golf Cabriolet (Engine code 2H).
There was a variant engine also used in the Golf and the Jetta during the years of 1984-1991 also (engine code HT, RV)
The last engine that could be found in these cars (Golf and Jetta) for the years of 1985-1991 was an engine codes of RD, PF
(RV and PF were the codes for 1987-1991)
Clear as mud I am sure.
For what is is worth, car-part.com only shows Fox engines on the interchange.