Formula One's governing body has formally approved plans to introduce a new V6 1.6 litre turbo engine from the start of the 2014 season.
The original plans had been for a 1.6 litre four cylinder hybrid turbo engine to be introduced in 2013 but that met resistance from some manufacturers.
Team technical heads met at last weekend's European Grand Prix in Valencia and suggested the new engines be allowed to rev higher than previously envisaged -- from around 12,000 rpm to 15,000.
Mercedes, Ferrari, Renault and Cosworth are the sport's current engine makers, with each supplying three teams.
