H2Zero said:i think single cam would be difficult to manage a "V" engine.... it should be DOHC.. guys correct me if I am wrong..
The VR6 is not exactly a V nor an inline 6. See http://www.autozine.org/technical_school/engine/tech_engine_packaging.htm which says :
"The first generation VR6 has 2 valves per cylinder, single overhead camshaft (sohc) serving each bank just like any conventional 2-valve V6s, although the 2 camshafts are so close that they look as if a twin-cam design.
However, in many ways the VR6 is constructed like an in-line engine. Thanks to the narrow angle, the two banks are merged into a single cylinder block. Also, a single cylinder head houses the valve gears for all 6 cylinders. In contrast, a conventional V6 consists of 2 blocks and 2 heads. As a result, VR6 is not only smaller, but also lighter. It would have been cheaper as well if not employ 7-bearing crankshaft"