Kg CO2 per litre of petrol vehicles

Petrol produces 2.3035 kgs of CO2 per litre burnt. The precise figures depend on the quality of the fuel. Since fuel weighs less than a kilogram per litre, it is interesting to see how the weight of emissions is multiplied by the addition of oxygen. The tables below show how the official test figures for CO2 emissions and combined MPG can be equated to see how individual vehicles perform in terms of CO2 per litre. Some cars appear to do better than the standard chemistry would suggest, whereas others do worse. The official tests measure exhaust gases only and then calculate the fuel consumption. So these figures show how far off the recording of test results can be due to errors, rounding differences, and the leeway of around 4% given to manufacturers to decide on which fuel consumption figure to use.

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Top 10 CO2 per litre petrol vehicles
make model derivative WLTP CO2 (kg/l) WLTP CO2 (gpkm) Litre per 100km MPG (combined)
makeVauxhallmodelAstra Hatchbackderivative1.4i Griffin 150PS Turbo S/S AutoWLTP CO2kg/l1.61WLTP CO2gpkm106Litre per 100km6.6MPG (combined)42.8
makeVauxhallmodelMokka Xderivative1.4i Turbo Elite 140PS S/S 4x4WLTP CO2kg/l1.66WLTP CO2gpkm128Litre per 100km7.7MPG (combined)36.7
makeVauxhallmodelMokka Xderivative1.4i Turbo Active 140PS Auto FWDWLTP CO2kg/l1.69WLTP CO2gpkm128Litre per 100km7.59MPG (combined)37.2
makeVauxhallmodelAstra Hatchbackderivative1.4i SRi 150PS Turbo S/S AutoWLTP CO2kg/l1.71WLTP CO2gpkm113Litre per 100km6.6MPG (combined)42.8
makeRolls-RoycemodelPhantomderivative6.75 V12 AutoWLTP CO2kg/l1.75WLTP CO2gpkm341Litre per 100km19.48MPG (combined)14.5
makeVauxhallmodelAstra Hatchbackderivative1.4i Griffin 150PS Turbo S/SWLTP CO2kg/l1.76WLTP CO2gpkm109Litre per 100km6.19MPG (combined)45.6
makeVauxhallmodelInsignia Grand Sportderivative1.6 SRi VX-Line Nav 200PS Turbo AutoWLTP CO2kg/l1.78WLTP CO2gpkm128Litre per 100km7.21MPG (combined)39.2
makeVauxhallmodelMokka Xderivative1.4i Turbo Active 140PS S/S ecoTEC FWDWLTP CO2kg/l1.78WLTP CO2gpkm128Litre per 100km7.21MPG (combined)39.2
makeVauxhallmodelAstra Hatchbackderivative1.4i SRi 150PS Turbo S/SWLTP CO2kg/l1.82WLTP CO2gpkm109Litre per 100km6MPG (combined)47.1
makeVauxhallmodelAstra Hatchbackderivative1.0i SRi 105PS Turbo S/S ecoTECWLTP CO2kg/l1.83WLTP CO2gpkm106Litre per 100km5.8MPG (combined)48.7
Bottom 10 CO2 per litre petrol vehicles
make model derivative WLTP CO2 (kg/l) WLTP CO2 (gpkm) Litre per 100km MPG (combined)
makeVauxhallmodelAstra Hatchbackderivative1.0i Tech Line Nav 105PS Turbo S/S ecoTECWLTP CO2kg/l3.22WLTP CO2gpkm187Litre per 100km5.8MPG (combined)48.7
makePeugeotmodel3008 SUVderivative1.6L PureTech GT Line 180 EAT8 S&SWLTP CO2kg/l3.19WLTP CO2gpkm165Litre per 100km5.17MPG (combined)54.6
makeFordmodelFiesta 3 Doorderivative1.0T EcoBoost ST-Line X Edition 125PS OldWLTP CO2kg/l2.95WLTP CO2gpkm130Litre per 100km4.4MPG (combined)64.2
makeFordmodelFiesta 5 Doorderivative1.0T EcoBoost ST-Line X Edition 125PS OldWLTP CO2kg/l2.95WLTP CO2gpkm130Litre per 100km4.4MPG (combined)64.2
makeFordmodelFiesta 3 Doorderivative1.0T EcoBoost ST-Line X Edition 95PS OldWLTP CO2kg/l2.93WLTP CO2gpkm129Litre per 100km4.4MPG (combined)64.2
makeFordmodelFiesta 5 Doorderivative1.0T EcoBoost ST-Line X Edition 95PS OldWLTP CO2kg/l2.93WLTP CO2gpkm129Litre per 100km4.4MPG (combined)64.2
makeJaguarmodelXF Sportbrakederivative2.0 Petrol R-Sport 250PS RWD AutoWLTP CO2kg/l2.91WLTP CO2gpkm195Litre per 100km6.71MPG (combined)42.1
makePorschemodelCayenne Sderivative3.0 V6 S Tiptronic SWLTP CO2kg/l2.9WLTP CO2gpkm267Litre per 100km9.2MPG (combined)30.7
makeFordmodelFiesta Active 5 Doorderivative1.0T EcoBoost Active X Edition 95PS OldWLTP CO2kg/l2.82WLTP CO2gpkm124Litre per 100km4.4MPG (combined)64.2
makePeugeotmodel3008 SUVderivative1.6L PureTech GT Line Premium 180 EAT8 S&SWLTP CO2kg/l2.79WLTP CO2gpkm167Litre per 100km5.98MPG (combined)47.2

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