The USB union believes the decision to spend big on Ronaldo means that Fiat will be missing out on investment, explaining such a move is "unacceptable" while workers were making "huge economic sacrifices".
"Real Madrid C.F. communicates that, according to the will and request expressed by the player Cristiano Ronaldo, the club has agreed to transfer him to Juventus F.C", Real Madrid said in its statement.
Both the football club and the carmaker are controlled by the Agnelli family through their holding company. The union added: "The owners should invest in vehicle models that guarantee the future of thousands of people rather than enriching only one", the union said.
Ronaldo completed a sensational €100million switch to the Serie A champions earlier this week, bringing an end to his successful nine-season stay in Madrid. He has that now that: "I did it in England, I did it in Spain, I'm going to do it in Italy... and I did it with Portugal".
SC pulls up Centre, UP govt for lethargy in protecting Taj Mahal
You start shutting them down", the bench said, adding, "Charity begins at home. "Either you demolish it or you restore it". The statement came in response to the lack of action taken to prevent and remedy the discoloration of the monument .
The vehicle manufacturer Fiat, to which the brand Ferrari exclusively belongs, is reportedly 29.1 percent owned by the Agnelli family, who also hold about 63.77 percent of Juventus.
Workers at the vehicle company's Melfi plant in southern Italy will walk off the job at 10 p.m. Sunday and remain on strike until 6 p.m. Tuesday, BBC News reported.
However, the impact of the stoppage is likely to be limited.
The USB Lavoro Privato union does not represent all workers at Melfi and the strike will be short, running from Sunday 15 July to Tuesday 17 July.