F1 engine deal is 'weak agreement', says Horner

Formula One - F1 - Mexican Grand Prix 2015 - Autodromo Hermanos Rodriguez, Mexico City - 30/10/15 Christian Horner - Red Bull Racing Team Principle Mandatory Credit: Action Images / Hoch Zwei Livepic

BARCELONA (Reuters) - Formula One's new power unit agreement from 2017 is better than nothing but still far from what might have been achieved, according to Red Bull team principal Christian Horner.

While the four major manufacturers welcomed the guarantee of stable rules, and highlighted efforts to reduce costs and performance gaps, Horner sounded a discordant note at the Spanish Grand Prix.