Kg CO2 per litre of petrol

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.

Click here to see diesel cars

Top 10 CO2 per litre petrol cars
Make Model Derivative CO2 (kg)/litre CO2 (gpkm) Litre per 100km MPG (combined) List price
BMW X1 sDrive18i M Sport Sport-Auto 2.00 122 6.10 46.3 £31,250
Land Rover Range Rover Evoque 2.0 Si4 HSE Dynamic 240hp 4WD Auto 2.11 165 7.80 36.2 £45,400
Vauxhall Grandland X 1.2 SE 130PS Turbo Start/Stop 2.17 117 5.40 52.3 £22,485
BMW 5 Series Touring New 520i M Sport Auto 2.19 136 6.21 45.5 £41,075
McLaren 570GT 3.8 Twin-Turbo V8 570PS Auto 2.19 258 11.77 24.0 £156,935
Mercedes-Benz C-Class Saloon C 200 SE 7-speed G-Tronic 2.19 123 5.60 50.4 £30,635
Ford Mustang Convertible New 2.3 EcoBoost 290PS 2.19 200 9.11 31.0 £39,495
BMW X1 sDrive18i M Sport 2.20 121 5.50 51.4 £29,900
Ford Mustang Fastback New 2.3 EcoBoost 290PS 2.20 199 9.02 31.3 £35,995
McLaren 540C Coupé 3.8 Twin-Turbo V8 540PS Auto 2.21 258 11.67 24.2 £127,820
Bottom 10 CO2 per litre petrol cars
Make Model Derivative CO2 (kg)/litre CO2 (gpkm) Litre per 100km MPG (combined) List price
DS DS 7 Crossback 1.6 PureTech Performance Line 225hp EAT8 2.77 135 4.88 57.9 £34,985
SEAT Leon 5 Door 2.0 TSI Cupra 300PS Start/Stop 2.68 158 5.90 47.9 £29,900
SEAT Ibiza New 1.5 TSI EVO FR 150PS 2.67 112 4.20 67.3 £17,680
Toyota Auris Touring Sports 1.2T VVT-i Design 2.63 126 4.80 58.9 £22,305
SEAT Ibiza New 1.0 TSI FR 115PS DSG 2.57 108 4.20 67.3 £17,710
Morgan Aero 8 4.8 V8 2.52 282 11.21 25.2 £102,005
Land Rover Range Rover Evoque 2.0 Si4 HSE Dynamic Lux 240hp 4WD Auto 2.48 181 7.30 38.7 £48,915
Volkswagen Polo New 1.0 TSI SEL 115PS 2.45 115 4.70 60.1 £18,180
Skoda Octavia Estate New 2.0 TSI vRS 230PS 2.44 149 6.10 46.3 £26,385
Vauxhall Zafira Tourer 1.4i VVT Turbo Design 140PS 2.44 156 6.41 44.1 £19,530