The emission laws on cars are strange. They can still make large engined polluting cars. Mine puts out quite a lot of Co2 compared with my previous 8 cars. It is a lot higher although it does not put out the diesel fumes of the previous ones.
Emission control is moving very fast now ready for the times when we have more hybrid. Be interesting to see a hybrid motorcycle. It could run a smaller petrol engine with a boost for overtaking from the battery pack and motor.