Consequently, the CO2 emissions are also higher.Īs an example of this, Hyundai's Tucson Highlander (pictured) is rated by the Green Vehicle Guide at 7.7L/100km for the turbocharged petrol (1.6-litre) variant, whereas the 2.0-litre diesel variant is rated as low as 6.8L/100km. In the case of diesel fuel, the carbon content is higher than in petrol.
When it combusts, the carbon in conventional fuels bonds with oxygen from the atmosphere to create (among other things) carbon-dioxide (CO2).
