On Dec 13, 10:21 pm, "Paul Scott"
wrote:

Why 172? How do they differ from 170s - are they the 75mph version?

Apparently yes, lighter weight, suburban layout, with similar bogies to the
220 Voyagers.


They will also have I suspect different engines - the MTU 183 (on
class 170/171) is no longer made.


In continental Europe the new-ish MTU 1800 is the 183 replacement -
but of course any new DMU could have any engine - MAN seem to be
gaining mainland popularity.

--
Nick