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)
makeMazdamodelMazda CX-5derivative2.0 Takumi 165PS e-Skyactiv G MHEV 2WDWLTP CO2kg/l0.68WLTP CO2gpkm46Litre per 100km6.81MPG (combined)41.5
makeVolkswagenmodelTiguanderivative2.0 TSI Black Edition 190PS 4MOTION DSGWLTP CO2kg/l1.53WLTP CO2gpkm127Litre per 100km8.31MPG (combined)34
makeRolls-RoycemodelPhantomderivative6.75 V12 AutoWLTP CO2kg/l1.75WLTP CO2gpkm341Litre per 100km19.48MPG (combined)14.5
makeCitroenmodelC4derivativePureTech 130 C-Series Edition S&SWLTP CO2kg/l1.84WLTP CO2gpkm119Litre per 100km6.48MPG (combined)43.6
makeMorganmodelSuper 3derivative1.5 118hpWLTP CO2kg/l1.84WLTP CO2gpkm130Litre per 100km7.06MPG (combined)40
makeCitroenmodelC4derivativePureTech 130 C-Series Edition S&S EAT8WLTP CO2kg/l1.87WLTP CO2gpkm130Litre per 100km6.96MPG (combined)40.6
makeCitroenmodelC4 XderivativePureTech 100 Sense S&SWLTP CO2kg/l1.87WLTP CO2gpkm121Litre per 100km6.48MPG (combined)43.6
makeCitroenmodelC4 XderivativePureTech 130 Sense Plus S&S EAT8WLTP CO2kg/l1.87WLTP CO2gpkm130Litre per 100km6.96MPG (combined)40.6
makeJeepmodelAvenger Newderivative1.2 Altitude+ 100hpWLTP CO2kg/l1.87WLTP CO2gpkm126Litre per 100km6.73MPG (combined)42
makeCitroenmodelC4derivativePureTech 130 Sense Plus S&SWLTP CO2kg/l1.88WLTP CO2gpkm122Litre per 100km6.48MPG (combined)43.6
Bottom 10 CO2 per litre petrol vehicles
make model derivative WLTP CO2 (kg/l) WLTP CO2 (gpkm) Litre per 100km MPG (combined)
makeFordmodelTransit Connect Double Cab-in-Vanderivative1.0 EcoBoost 230 L1 Trend 100PSWLTP CO2kg/l3.06WLTP CO2gpkm159Litre per 100km5.2MPG (combined)54.3
makeLand RovermodelDefender 90derivative5.0 P525 V8 AWD AutoWLTP CO2kg/l2.99WLTP CO2gpkm330Litre per 100km11.03MPG (combined)25.6
makeLand RovermodelDefender 110derivative5.0 P525 V8 AWD AutoWLTP CO2kg/l2.98WLTP CO2gpkm334Litre per 100km11.21MPG (combined)25.2
makeCitroenmodelC3 Aircross SUVderivativePureTech 110 S&S MaxWLTP CO2kg/l2.61WLTP CO2gpkm136Litre per 100km5.21MPG (combined)54.2
makeFordmodelFiesta 5 Doorderivative1.0L EcoBoost ST-Line X 100PSWLTP CO2kg/l2.59WLTP CO2gpkm132Litre per 100km5.1MPG (combined)55.4
makeCitroenmodelC3 Aircross SUVderivativePureTech 110 S&S YOU!WLTP CO2kg/l2.57WLTP CO2gpkm134Litre per 100km5.21MPG (combined)54.2
makeFordmodelFiesta Active 5 Doorderivative1.0L EcoBoost Active X 100PSWLTP CO2kg/l2.57WLTP CO2gpkm131Litre per 100km5.1MPG (combined)55.4
makeLamborghinimodelUrusderivative4.0T FSI V8 AutoWLTP CO2kg/l2.55WLTP CO2gpkm325Litre per 100km12.72MPG (combined)22.2
makeDSmodelDS 3derivativePureTech 130 Performance Line + S&S EAT8 OldWLTP CO2kg/l2.52WLTP CO2gpkm137Litre per 100km5.43MPG (combined)52
makeCitroenmodelC3 Aircross SUVderivativePureTech 130 S&S Max EAT6WLTP CO2kg/l2.51WLTP CO2gpkm146Litre per 100km5.82MPG (combined)48.5