The New York herald., 1920-01-04
NEW MARMQN
SERIES EXHIBITED
High Efficiency Motor Is Trifle
Shorter, but Cylinders Are
of Same Size.

Exhibited for the first time in th,. Grand
Central Palace Show. the new series Mar
mon "a has a high efficiency motor that
seems as pronounced a novelty as waS
the first Marmon "a. shown four years
ago. with its radical departure from con-
ventional design. The light weight feat
ures. deep thin section frame, extensive
employment of alloy steel and the use of
aluminium in motor, body tenders and
gear set and differential housings are con-
tinued The body lines of the open cars.
though modified and embelished here and
there, still retain the vigorous character
istics that have given them individuality.
The high efficiency motor is u trifle
shorter than previous models but the six
cylinders have the same bore and stroke,
and the same principles of design are
found throughout the power plant. The
manufacturing of the engine, however.
has been changed to the new standards
of precision that were learned by the COM
pany in producing aviation engines for
the government. The delcacy Of the ma
chine work and the close accuracy and
precision Of this power plant are suggested
by the splendid external finish OF the
motor. Gray enamel baked on the entire
engine, from aluminium valve mechanism
cover to oil base, give this unit foreign
air. The iron header and the two gray
iron cylinder sleeve blocks OF three units
each arc as handsomely enamelled as the
two piece aluminium crank case.
Force feed oiling through the massive
crank shaft and to the main and connect
ing rod bearings, which float is con-
tinued and in the new design the flow
of the oil is so rapid that it acts as a
bearing cooler as well as lubricant. All
this, of course, is automatic and one does
tfAt have to trouble his head about il, and
az l,o I,n ON fyfnr works the greater
the volume Of oil fed TO bearings and NOV
ing parts.
The pistons are Of unique two-piece con-
central portion and head OF
aluminium with an iron skirt that fits over
the lower part of the main structure,
enclosing the the wrist pin
This unique design gives the advantages or
both metals, head that does not SCOT
and skirt that fits snugly against the
oil film of the cylinder sleeve. There are
other niceties of the motor design and
which the technical man will
find graphically portrayed at the special
motor, exhibits staged in the lobby Of the
Hotel Commodore.
The body has several inches. more room
because of the shorter engine and hood
and it is replete with details that will
plea Sc the connoisseur. To begin with, the
instrument dials are grouped into a cen
tral SlaSS-COVeTeQ case III tflc centre OI
board. Glareless indirect
lighting furnishes illumination and all dials
may be read at a glance. The door pockets
are larger and the leather flaps are OF
generous size, while the upholstery is
in new fashion that adds to com
fort as we'll as to appearance. In the ton
neau there is more room also. and the
leather fitting, the auxiliary pockets be-
side the rear seat, the leather curtains that
cover the spares when they are folded
away speak of designer who had fine
ideas and was given a free hand.
To the line OF the standard seven pas
senger touring car and the roadster, which
has divided front seat with an aisleway
giving into the rear compartment, has been