Peugeot workers who face losing their jobs within a year have voted not to take strike action.
Mr Woodley said a boycott of Peugeot goods is one option
The Transport and General Workers' Union announced the result on Monday lunchtime, only 90 minutes after the ballot closed at midday.
Staff at the Ryton car plant in Warwickshire were balloted after Peugeot bosses turned down union ideas for keeping the plant open.
The union said members voted by 516 to 440 against taking industrial action.
Unions had put forward plans to operate under a single-shift system.
T and G General secretary Tony Woodley said the vote reflected the fact many workers wanted to take redundancy and it did not signal the end of the campaign to keep the factory open.
He said: "The trade unions have produced a robust plan which could guarantee a secure and profitable future for the plant. Management have yet to respond to this plan in any meaningful way.
Ryton is due to shut next year with the loss of 2,300 jobs
"We will now be discussing with those of our members who will still be working at Ryton after July how to carry forward the campaign to save their jobs and stop the collapse of manufacturing industry in this country.
"All options are still on the table."
He added unions had not ruled out a possible boycott of Peugeot products in the UK as part of the campaign to save Ryton from closure.
Ryton is due to shut next year with the loss of 2,300 jobs, but the firm will still employ 1,000 workers in Coventry at two other sites.
The firm recently told shareholders the plant must close as it is the most expensive in the entire company to run.