Porsche 911 Turbo S:
NEDC: fuel consumption [in l/100km] combined 11,1; CO₂ emissions (in g/km) combined 254
WLTP: fuel consumption (in l/100km) combined 12,3–12; CO₂ emissions (in g/km) combined 278–271
Further information on the official fuel consumption and official, specific CO₂ emissions of new passenger cars is available in the “Guidelines on fuel consumption, CO₂ emissions and power consumption of new passenger cars” [Leitfaden über den Kraftstoffverbrauch, die CO₂-Emissionen und den Stromverbrauch neuer Personenkraftwagen], available free of charge from all sales outlets and from Deutsche Automobil Treuhand GmbH (DAT).
You can find more information on the difference between WLTP and NEDC at www.porsche.com/wltp