Four diesel passenger vehichles approved according to Euro 4 emission standards were tested in this project. Two of the vehicles are equipped with DPF. The vehicles were tested using the NEDC test cycle at 22°C and -7°C and the Artemis test cycle at 22 °C. CO, HC, NOx, NO2, PM, particle number emissions and fuel consumption were measured. The PM and particle number emissions were measured according to the PMP protocol. The fuel consumption and CO2 emission of all 4 vehicles are in good agreement with the declared values. Except SKODA for PM emissions, all regulated emissions are below the regulated limits. The vehicles with DPF have significantly lower PM and particle number emissions comparing to the non-DPF vehicles. During regeneration the DPF vehicle has much higher PM and particle number emissions than the non-regeneration test. The regeneration also leads to increasing in CO, HC and NOx emission and fuel consumption. Generally the NEDC tests have higher HC and CO emissions and lower NOx emissions than the Artemis test. The fuel consumption follows such a sequence: AU>NEDC>AH>AEU. Comparing to the 22°C NEDC test, the -7°C NEDC tests leads to increasing in regulated emissions (both gaseous and PM) and fuel consumption. However the low test temperature has no significant impacts upon particle number emissions. In both 22°C and -7°C NEDC tests, the most emissions (HC, CO, NOx, CO2 and particle number) emit during the cold start driving phase, but the highest NO2/NOx ratio occurs in the extra urban driving phase.