(13 Aug 2020, 9:52 pm)JP6004 wrote Agreed 6 cylinder would be best suited to X21/X84/85 and possibly X9/X10....although cant see coaches going anywhere soon. Also maybe the 20 should it ever be upgraded to DD
To be honest, I think the 6 cylinder is overkill for even the X21. The 4 cylinder with more suitable gearing (whether or not that is available, I don't know) would be more than adequate