McLaren-Honda has moved to play down the suggestion it could begin the 2016 Formula 1 season with an extra 220hp to play, labelling reports 'unsubstantiated'.

Reports in the Spanish media had suggested Honda had solved ongoing issues with its ERS - which couldn't be fully deployed in 2015 - with modifications to the car's compact packaging, as well as engine upgrades, would see it make substantial gains in terms of power.

However, Honda has rubbished the figures, branding the reports as 'unsubstantiated and merely speculative', according to Sky Sports F1

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"Recent media reports have suggested a huge horsepower boost for McLaren-Honda in 2016. These reports are unsubstantiated and merely speculative, and we ask fans and media alike to treat them as such."

McLaren - which suffered its worst F1 season since 1980 last year primarily because of the Honda power unit's poor performance and reliability - will unveil its 2016 contender, the MP4-31, on February 21st, the day before pre-season testing kicks off.