How would you classify a battery-electric car and a plug-in hybrid with a minimum range of 40 km?

Correct answer: Zero emissions.

Battery electric vehicles and plug-in hybrids with an electric range of at least 40 km are in the zero emissions category, like the car in the image with its blue badge. A plug-in hybrid with a shorter range is ECO, and A is for vehicles that do not qualify for any other category.

Real Decreto 2822/1998, de 23 de diciembre, por el que se aprueba el Reglamento General de Vehículos