If the 2006 prize list once again devotes the Toyota Prius hybrid to the “gasoline” category with a CO2 performance of 104 g / km, it nevertheless sees the arrival in second place of small gasoline city cars Citroën C1 1.0 i, Peugeot 107 1.0 e , Toyota AYGO 1.0 VVT-i, Daihatsu Cuore with an emission level of 109 gCO2 / km.
In the “Diesel” category, the prize goes to the Smart Fortwo which is ahead of the Citroën C2 (107 g / km). Of the 11 diesel models with the 10 best CO2 emissions, 6 are French.