
The Blue one has well over a million miles on the clock and is held together entirely by duct tape, cable ties and willpower. There are quite a few stories floating around of roadside repairs where it has been bodged back together using nothing but parts of itself.
Not sure what the power unit in the red one is for certain, but they certainly both sound like XUDs, and I know that the last mid 90s one I worked on had an XUD under the bonnet.