Facebook fury has erupted among Jaguar Land Rover (JLR) workers - with shopfloor staff accusing Indian owners Tata of ripping off their pensions to pay for a 14 per cent rise.

Scores of angry JLR workers took to the popular social media website claiming that a proposed three-year pay deal was to come out of their pension fund.

Workers and sympathisers claimed that Tata was taking £240 million out to fund the proposed rise, which had already led to a vitriolic attack from the Joint Shop Stewards Committee.

A shop stewards internal briefing document accuses JLR of "investing millions around the globe on the back of the sweat of the UK workforce".

The committee says the JLR Defined Benefit pension scheme is "under attack" and has called for a 'no' vote in the forthcoming workplace ballot on pay.

The dispute comes as its new Engine Manufacturing Centre near Wolverhampton was officially opened last week by the Queen and Duke of Edinburgh.

Writing on Facebook, David O'Toole said: "All we want is our pensions to be left alone and a decent pay rise. Not too much to ask off a company making £10 million profit a day.

"If they're making £10 million profit a day why do they want to use £240 million out of our pension pot to give us a pay rise out of our money?"

Rachael Newman said: "The point is it is coming out of the pension...how is that a pay rise? A lot of workers would be very happy at what's been offered if it wasn't self-funded."

Leeann Turner said: "It's not a pay rise coming from the company profits, it's a pay-rise coming from their own pension pot...it's understandable why they are complaining."

Marty Hales said: "The pay rise is being funded out of Land Rover pensions not profits, a massive £240 million hit."

It is understood that JLR has proposed switching the Defined Benefit fund from final salary to an inferior career average scheme, potentially hitting workers in the pocket.

A JLR spokesman said: "Our offer was based on a desire to appropriately reward our workforce for their contribution to Jaguar Land Rover's success whilst balancing the longer-term needs to deliver sustainable business growth."