Kg CO2 per litre of diesel

If you burn a litre of diesel this will produce 2.6391 kgs of carbon dioxide. Petrol has a lower carbon content and so produces 2.3035 kgs of CO2. 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 diesel cars
Make Model Derivative CO2 (kg)/litre CO2 (gpkm) Litre per 100km MPG (combined) List price
BMW 7 Series 730d xDrive Auto 2.24 132 5.90 47.9 £67,940
Volkswagen Beetle Cabriolet New 2.0 TDI Design 110PS BMT DSG 2.33 121 5.20 54.3 £26,025
Volkswagen Beetle New 2.0 TDI Design 110PS BMT DSG 2.33 121 5.20 54.3 £23,030
Volkswagen Golf 3 Door 1.6 TDI GT Edition 110PS BMT 2.33 105 4.50 62.8 £23,495
Volkswagen Golf 5 Door 1.6 TDI GT Edition 110PS BMT 2.33 105 4.50 62.8 £24,150
Renault Trafic Passenger SL29 ENERGY dCi 145 Sport SWB 9-seat 2.37 152 6.41 44.1 £33,843
Volkswagen Golf Estate New 2.0 TDI GTD BlueLine 184PS BMT DSG 2.38 119 5.00 56.5 £30,345
Fiat Fiorino Combi 1.3 MultiJet Crew 80HP 2.45 115 4.70 60.1 £16,883
Kia pro_cee'd 1.6 CRDi 2 DCT ISG 2.45 103 4.20 67.3 £20,635
Hyundai i40 Saloon 1.7 CRDi Premium 141PS Blue Drive DCT 2.46 123 5.00 56.5 £28,235
Bottom 10 CO2 per litre diesel cars
Make Model Derivative CO2 (kg)/litre CO2 (gpkm) Litre per 100km MPG (combined) List price
Mercedes-Benz E-Class Saloon E 220 d AMG Line 4MATIC 9-speed G-Tronic 3.00 129 4.30 65.7 £40,815
Jeep Wrangler 2.8 CRD Night Eagle 2dr Auto 2.98 235 7.89 35.8 £39,810
Vauxhall Combo Crew 1.6 CDTi 2300 L2H1 Sportive 105PS Start/Stop ecoFLEX 2.96 139 4.70 60.1 £24,397
Mercedes-Benz A-Class A 180 d AMG Line 2.91 102 3.50 80.7 £25,480
Mercedes-Benz E-Class Saloon E 220 d AMG Line 9-speed G-Tronic 2.87 112 3.90 72.4 £39,215
Mercedes-Benz GLC-Class Coupé GLC 220 d 4MATIC AMG Line 9-speed G-Tronic 2.86 143 5.00 56.5 £42,785
Mercedes-Benz E-Class Estate E 200 d AMG Line 9-speed G-Tronic 2.86 120 4.20 67.3 £39,720
Mercedes-Benz SLC-Class SLC 250 d AMG Line 9-speed G-Tronic 2.85 114 4.00 70.6 £37,240
Volvo V90 2.0 D5 AWD PowerPulse Cross Country 235HP Geartronic 2.83 139 4.90 57.6 £44,405
Mercedes-Benz GLC-Class Coupé GLC 350 d 4MATIC AMG Line 9-speed G-Tronic 2.82 169 6.00 47.1 £49,135