Cuts could be made to its European operations over the next two years.
Shop stewards from Ford factories have been given a briefing on the proposals.
Unite has told us plans are for a total of 1,150 job losses in the UK, with almost 1,000 at Bridgend and the rest at Ford's transport operations, which would affect lorry drivers across the UK.
The trade union's national officer for automotive industries Des Quinn said: “What is being proposed at Bridgend is due to take place in two stages over two years.
“It is a devastating blow for our members and their families, as well as having grave implications for the Welsh economy and the supply chain.
“Unite is fully committed to opposing any compulsory redundancies and campaigning strongly for Bridgend to have a viable future. We will be consulting our members very closely in the days and weeks ahead.
“There are a number of factors behind this grim news – the main ones being challenging market conditions for carmakers generally, a lack of a coherent industrial strategy from the UK government and the uncertainty created by Brexit.
“Over the last two decades the UK car industry has experienced a renaissance of which we can all be proud of.
“The challenge for government, the carmakers and the unions in the near future is to fight very hard to maintain the environment that made that success possible.”
Plaid Cymru shadow minister for the economy Rhun ap Iorwerth AM said: “These reports are devastating – both for the workers directly affected and the wider Welsh economy. If confirmed, it would mean that the Ford plant in Bridgend is set to lose the majority of its workforce. I will do everything in my power to make sure these workers are supported and their rights protected.
“Questions have been raised about the future of the plant for some time. The Labour Welsh Government should already be at the door of the Ford management, pressing them on this decision, which will seemingly lead to terrible consequences for thousands of families that rely on Ford for employment. An urgent economic summit should be organised, of the kind set up at the time of the economic crisis a decade ago.
“I will also be seeking urgent meetings with the workers and their representatives, as well as with Ford.
“A number of different factors will have undoubtedly led to this decision, however, Brexit’s part in this distressing news is undeniable. The economic reality of Brexit is jobs will be lost because of the political decisions made in London.