Best in class:
Volkswagen Scirocco 2.0 TDI 140 - 134g/km
Best of the rest:
Peugeot RCZ 2.0 HDI 163 - 139g/km
Daihatsu Copen 1.3 - 140g/km
Alfa Romeo Brera 2.0 JTD 170 - 142g/km
Alfa Romeo Spider 2.0 JTD 170 - 142g/km
You wouldn't expect sports cars to return impressive CO2 figures, but this list shows progress is being made. Last year, only one car was below 160 g/km of CO2, but now there are quite a few models around 140 g/km or lower. The secret is a new range of efficient, but powerful diesel engines.
