Horex VR6 Patent Includes W8 Configuration

1500cc W8 engine described in patent documents

By Motorcycle.Com Staff, Feb. 11, 2011
The new Horex surprised the motorcycle world with plans to produce a supercharged VR6 Roadster, but patent documents uncovered by U.K. website Visordown reveal the company also considered a W configuration.

The VR6 Roadster uses two a 1218cc triple overhead camshaft engine with two offset rows of three cylinders at a 15 degree angle. The engine configuration allows the engine to be compact enough for a motorcycle (Horex says it is slightly wider than a conventional inline-four but also slightly shorter).

Horex patent documents

A U.S. patent registered to Clemens Neese, founder of the revived Horex, for the VR configuration also allows for two VR setups to share the same crankshaft in a W arrangement up to 12 cylinders. Like the VR configuration, W engines are used by automaker Volkswagen with examples including the 2001 VW Passat and the 2011 Audi A8.

Horex patent documents

Illustrations show a W8 engine mounted longitudinally on a motorcycle with the cylinders pointing outward like on a Moto Guzzi. The diagram is an example of a 1500cc W8 with a 60.6mm bore and 65mm stroke. The engine is comprised of two 15-degree V-inline banks joined in at a 72 degree angle.

A Horex W8 isn’t likely to emerge any time soon however, as the VR6 Roadster won’t enter production until later this year.

Horex VR6 Roadster

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