Attention everyone... this is very important, regarding the newest train pack involving the new R142, R142A, R211A, and R211T which btw are being actively developed still and will be updated. 
You need AT LEAST 16 GB of RAM, with a graphics card capable of AT LEAST 6 GB of VRAM to run these trains!!
DONT PLAY YOURSELF, running these at lower end specs is dangerous for your PC as it can cause your RAM to shutdown to avoid any damage due to exceeding its max capacity. We hope to have a fix soon but in the meantime use the alternatives below if you do not meet this requirement:  

As an alternative, the older models of the R142, R142A, R179, and R211A  are provided below and will work in any OpenBVE Versions.