Audi looks certain to continue racing its Le Mans 24 Hours-winning R18 e-tron quattro LMP1 with only one hybrid system in next year's World Endurance Championship.Audi Sport boss Wolfgang Ullrich said that no major changes to the concept of the R18 turbodiesel were planned in the development drive to increase...

Porsche has downgraded the amount of hybrid energy its new 919 will run in this year's World Endurance Championship.The German manufacturer had announced its intention to race in the highest of the four subclasses of recovered energy in 2014, which allows for eight megajoules to be used per lap of...