Renault reveal 'fundamental' changes to 2015 power unit

Renault say they have achieved a 'fundamental' overhaul of their Formula One power unit ahead of the 2015 season, as they bid to reduce last year's performance deficit to Mercedes. Managing director Cyril Abiteboul said sweeping changes have allowed Renault to make significant progress over the winter in terms of both reliability and performance, with the French manufacturer now targeting upwards of the three victories they scored in 2014

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