The leaders of the eurozone's four biggest economies on Friday vowed measures worth up to 130 billion euros ($163bn) to tackle the bloc's relentless debt crisis.

Meeting for talks in Rome ahead of a crucial EU summit in Brussels next week, the leaders of Germany, France, Italy and Spain looked to soothe global worries with promises to kickstart growth in the bloc's floundering economies.

French President Francois Hollande said the leaders had agreed to mobilise "one per cent of European GDP, that is 120 to 130 billion euros, to support growth" - a move Germany's Angela Merkel hailed as "an important signal".

Italian Prime Minister Mario Monti said the four leaders had agreed that boosting growth in the eurozone was key to restoring confidence.