Mmhhh that's strange... no ctd, no errors...
1) Do it again and, when you are push back again on selection screen, close the game completely
2) Go to your Documents/Assetto Corsa/log folder and send me log.txt and errors.txt
3) Try using Content Manager https://assettocorsa.club/content-manager.html (just free version is enough) to start a race with that car and tell me if it's the same
4) And is it the same with other my Abarth as well?
1) Do it again and, when you are push back again on selection screen, close the game completely
2) Go to your Documents/Assetto Corsa/log folder and send me log.txt and errors.txt
3) Try using Content Manager https://assettocorsa.club/content-manager.html (just free version is enough) to start a race with that car and tell me if it's the same
4) And is it the same with other my Abarth as well?