Another bold leap forward ? the new twin-turbo engine. Up to 420 horsepower. Top track speeds up to 191mph. And a 0-60 sprint of 3.7 seconds. All, remarkably, while reducing fuel consumption. It is, quite simply, the most efficient 911 to date. Combined fuel consumption in accordance with EU 6: 911 Carrera models: 9.0-7.4 l/100 km, CO2 emissions: 208-169 g/km