Best in class:
Audi A5 2.0 TDI 170 - 134g/km
Best of the rest:
Audi TT 2.0 TDI 170 - 139g/km
Mercedes CLK 220 CDI - 172g/km
BMW Z4 2.0 - 176g/km
The best cars here are diesels, but the Audi dominates much of this segment with new TDI versions of its TT and A5. Given that the A5 is substantially heavier than the TT, its 134g/km CO2 is all the more impressive. The Volvo C70 is in third place, but it is quite a long way behind the class-leading Audis. A hybrid Toyota coupe, due in a couple of years, will add interest to this class of car.
