[Vwdiesel] TD vs. NA in stationary apps

[Scott Kair]

    The powers that be are planning to buy a new street sweeper for the
department and we're looking at whether to go with the turbocharger option.
    The powerplant will be a Perkins, either a 90hp NA or 120 hp TD.  The
engine supplies power to hydraulic pumps which supply power to the drive
motors and various motors powering the sweeping mechanisms.  For practical
purposes, rpm will be constant while working, somwhat higher while
transporting.
    This being Illinois, terrain is fairly flat.
    We tested the turbo version, but for the cost of that option, we could
buy a couple of other neat options.  A demo without the turbo wasn't
available.
    Has anyone ever used stationary engines in both configurations?  If so,
how did they compare?
    I measured the engine in the demo, and I don't think it would fit in a
Jetta.  Also, it was bolted in too securely to remove over the salesman's
lunch break.  (Required VW content.)
    TIA,
    Scott Kair