Kg CO2 per litre of petrol

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 CO2 (kg/l) CO2 (gpkm) Litre per 100km MPG (combined)
makeFiatmodelPanda Crossderivative0.9 TwinAir Waze 85HPCO2kg/l1.4CO2gpkm106Litre per 100km7.59MPG (combined)37.2
makeMercedes-BenzmodelB-ClassderivativeB 180 SportCO2kg/l1.53CO2gpkm101Litre per 100km6.6MPG (combined)42.8
makeCitroenmodelC1derivativeVTi 72 S&S Touch 3-doorCO2kg/l1.57CO2gpkm85Litre per 100km5.41MPG (combined)52.2
makeFiatmodel500derivative1.0 Pop Mild Hybrid 70HPCO2kg/l1.6CO2gpkm88Litre per 100km5.5MPG (combined)51.4
makeFiatmodel500Cderivative1.0 Pop Mild Hybrid 70HPCO2kg/l1.6CO2gpkm88Litre per 100km5.5MPG (combined)51.4
makeFiatmodelPanda Crossderivative1.0 City Cross Mild Hybrid 70HPCO2kg/l1.61CO2gpkm90Litre per 100km5.6MPG (combined)50.4
makeBMWmodel2 Series Gran Tourerderivative220i Sport Sport-AutoCO2kg/l1.65CO2gpkm129Litre per 100km7.8MPG (combined)36.2
makePorschemodelPanamera Sport Turismoderivative2.9 V6 4S PDKCO2kg/l1.65CO2gpkm187Litre per 100km11.3MPG (combined)25.0
makeBMWmodel2 Series Active Tourerderivative220i Sport Sport-AutoCO2kg/l1.66CO2gpkm123Litre per 100km7.39MPG (combined)38.2
makeLamborghinimodelHuracan EVO Spyderderivative5.2 V10 MPI 640 AutoCO2kg/l1.67CO2gpkm285Litre per 100km17.02MPG (combined)16.6
Bottom 10 CO2 per litre petrol vehicles
make model derivative CO2 (kg/l) CO2 (gpkm) Litre per 100km MPG (combined)
makeMorganmodelPlus 4derivative2.0CO2kg/l2.89CO2gpkm205Litre per 100km7.1MPG (combined)39.8
makeJeepmodelGrand CherokeederivativeCO2kg/l2.87CO2gpkm395Litre per 100km13.78MPG (combined)20.5
makeAston MartinmodelVantagederivativeCO2kg/l2.76CO2gpkm285Litre per 100km10.31MPG (combined)27.4
makeVolvomodelXC60derivativeCO2kg/l2.7CO2gpkm165Litre per 100km6.1MPG (combined)46.3
makeVolvomodelXC60derivativeCO2kg/l2.66CO2gpkm162Litre per 100km6.1MPG (combined)46.3
makeVolvomodelXC60derivativeCO2kg/l2.62CO2gpkm160Litre per 100km6.1MPG (combined)46.3
makeFordmodelNew Transit Connect Double Cab-in-VanderivativeCO2kg/l2.6CO2gpkm146Litre per 100km5.6MPG (combined)50.4
makeJaguarmodelXF SportbrakederivativeCO2kg/l2.55CO2gpkm171Litre per 100km6.71MPG (combined)42.1
makePeugeotmodel3008 SUVderivativeCO2kg/l2.49CO2gpkm129Litre per 100km5.17MPG (combined)54.6
makeFordmodelNew Mustang FastbackderivativeCO2kg/l2.43CO2gpkm287Litre per 100km11.82MPG (combined)23.9