Austro-Daimler ADV

The ADV-model, in this case from 1925, features front wheel brakes and a special inlet manifold for two carburators in comparison with the earlier and more common Austro-Daimler 617.
Also are the wheels and tyres broader and sturdier. The tyre size of this ADV is 6.50-20. Weight of the car is about 2,1 tons. The motor is a 6-cylinder, 4.43 litres single overhead, vertical shaft driven, camshaft.
It's made of cast aluminium exept for the head which is cast iron. In an AD 617, the engine has 60 hp.
Front axle suspension is conventional while rear axle suspension is of the cantilever type with enclosed propeller shaft.
The AD 617 and ADV have no cooling fan behind the radiator. Instead, the flywheel has a big aluminium ring shaped as a turbine, which sucks air out of the engine compartment. For that reason the bonnet doesn't have any fins or other openings. As a consequence, air is sucked in trough the radiator.
This gives a remarkable clean engine compartment, uncluttered with belt, pulleys and fan. This also makes the necessary space for the engine shorter and partly utilises the space behind the v-shaped radiator for the motor block. Also water pump, generator and magneto are built into the motor block under an easily removable left side cover. In fact, this engine design became the start of a new fashion, preferably amongst makers of luxury cars, called "The clean engine concept".

The AD 617 and ADV cars were engineered by Ferdinand Porsche during his time as director for the Österreichische Daimler Motoren AG in Wiener Neustadt, Austria during some time about 1920.

There are probably only 5 ADV left in the world, including this.

This ADV is a dual cowl phaeton, with restored chassies, front axle and wooden frame in the bottom of the body. The rest is in running order, in some details repaired. However, the seats are in bad condition and not complete, especially concerning the upholstery. The number of seats is up to ten.
The aluminium bonnet is under construction since the original one was lost long time ago.
The owner of this car has two motors in running order, one equipped as AD 617 with the thereto correct single Pallas carburator (currently in the car), and the other with the special ADV intake manifold, but since it lacks its two french-built Zenith HK 36 carburators, another Zenith is mounted by special arrangement for the time being, which enables the motor to be driven.
Pictures show scenes during an engine
and cylinder head swap
concerning the two motors mentioned above.

Note the visible flywheel-turbine in de-motorized car below and the vertical shaft drive from the crank, during overhaul, where oil pan and rear lower bearings, which includes the oil pump,
are removed (below right).
Restorer: Christopher Sylwan, Sweden E-mail: sylwan@ket.kth.se