(26 Jan 2015, 9:46 pm)MarcTheA4 wrote I recall my ride on BF63 HDC during its X21 trials, from Chester-le-Street to Durham.
It didn't have much oomph as I recall, and felt a bit like an Angel B5HL, but the engine was a lot more noticeable.
I'm no expert, so I really can't pass comment other than - I think they wouldn't do bad on the X21.
I drove the B5 demonstrator on the X21, and it didn't impress me at all.
It didn't have enough poke to get it to a reasonable pace going north on the A1(M) or south on the A167 past Plawsworth, but I suspected that perhaps it was set up for Lothian.
Unfortunately, small engines with massive turbos strapped to the top of them are the future of buses, in order to comply with emission regulations.