For this paper, the CO2 emissions levels of two versions of the Volkswagen Golf, one diesel (Golf TDI) and one gasoline (Golf TSI), were compared both in laboratory tests and in on-road measurements under real-world driving conditions.

For this study, a C-segment passenger vehicle, equipped with a gasoline direct injection engine and compliant with the Euro 6c standard, was tested on the chassis dynamometer over the regulatory NEDC and WLTC cycles, and over two RDE-like cycles. The tests were performed at different ambient conditions and with both cold and warm engines.

The eco-innovations mechanism rewards innovative technologies that produce real-world CO2 savings beyond what is measured over the standardized test cycle during vehicle type approval.

On November 8, 2017, the European Commission (EC) published its regulatory proposal for post-2020 carbon dioxide targets for new passenger cars and light-commercial vehicles (vans). The proposed regulation would be the third set of mandatory vehicle CO2 performance standards in the European Union (EU).