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The Austro-Daimler ADR is a passenger car of the upper class which was produced by Austro-Daimler from 1927 to 1934, as a successor to the ADM.

The car was designed by former Porsche employee Karl Rabe. The "R" in the model name refers to the novel tubular frame chassis which replaced the platform of its predecessor.

As with the previous model of the engine was manufactured from a light alloy and drove a camshaft by a vertical shaft. The car had a 3.0 litre 6-cylinder in-line engine which was front-mounted, this drove the rear wheels via a 4-speed gearbox.

The front wheels were attached to a rigid axle and had longitudinal leaf-springs for suspension. The rear wheels were on a swing axle, which was supported by transverse-leaf springs. A total of 2600 ADR cars were made.

From 1929, an additionally model was  available. This was the Austro-Daimler ADR Sports. The model had the  3 litre ADM engine which produced 100 hp. The cars was built until 1931 after about 50 vehicles had been produced.

In 1930 the Austro-Daimler ADR 8 was available as the top model. The huge saloon was about 5.5 meters in length and had an 4.6 litre 8-cylinder in-line engine with a power output of 100hp. The car was produced up until 1934 and only about 50 cars were made. In foreign markets, the car was known as 'Alpine'.

In 1931 the Austro-Daimler ADR 6 'Bergmeister' model was released. It had an 6-cylinder engine with a capacity of 3.6 litres and a power output of 120hp. Just like the ADR 8, only 50 cars were built.

All of the ADR models had an 12 volt electrical system.

Following a merger in 1934 with Steyr Werke, Austro-Daimler focused more on military vehicles.

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