This study focuses on the evolution in an ageing chamber of the particles emitted by two Diesel vehicles: a Euro 5 with a Diesel Particle Filter (DPF) and a Euro 3. Both vehicles were tested on a chassis dynamometer with Artemis urban cold start (UC) and Artemis motorway (MW) cycles. Exhaust gas was injected in a 8-cubic-meter dark ageing chamber through a stainless steel line heated at 120°C, during 16 to 25 minutes. The evolution of the particles was monitored during 10 hours. Moreover, exhaust gas was sampled at emssion from the heated line on sorbent tunes, which were then analyzed with ATD-GC-MS. For the Euro 5 DPF vehicle, particle mass (PM) concentrations are below 2µg/m3 (UC/MW) and remain stable during 10h. For the Euro 3 Diesel vehicle, PM concentrations start at 270µg/m3 (UC) and 2200µg/m3 (MW). PM increases of 29% during the first 90min and then stays stable until the end for the MW. For the UC, PM increases of 125% during 10h. This indicates the formation of new particulate matter, which might in part be explained by condensation of Semi-Volatile Organic Compounds (SVOCs). Moreover, condensation would also explain the increase of the mean particle size from 250 to 500nm. Particle number (PN) concentration is close to the background for the Euro 5 DPF UC condition. For MW conditions, the particle mean size is around 20nm. For the Euro 3 Diesel UC and MW conditions, larger particles are emitted and the initial mean particle size is around 120-150nm. Moreover, the total PN decreases and the mean particle size increases with time. This could be explained by coagulation processes. Furthermore, small particles around 30nm are formed during the first hour for Euro 5 DPF MW conditions, probably by nucleation processes. Finally, different SVOCs - such as alkane, alkene, cyclo, and aromatic compounds - were followed with C numbers between C12 and C30 at emission and during the first 6h of ageing. Considering their relatively low volatilities, these SVOCs could play a role in secondary particle formation through physicochemical interactions.