Originally Posted by garblin
Can anyone tell me the difference between these engines?
Basically, the lower halves of the engines are the same. The upper intake manifold on the Series III is aluminium as opposed to composite plastic on the Series II. Adittionally, the Series III is drive by wire, in other words there is no accellerator cable, it is an electronic/electrical link between the gas pedal & throttle positioner. There may be other differences, I've pointed out the major ones. BTW, Welcome to the Club.