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VR6 is an engine configuration developed by the Volkswagen Group. It is similar to the V engine, but with the cylinders offset from each other and tilted by 15° instead of 90°. This is most easily visualized from this top-down perspective:
The narrow angle between cylinder banks allows just two camshafts to drive all of the valves, and a single cylinder head to be used. The main advantage of the VR6 design is a compact but fairly powerful engine.