The 'duke' is 4 x 3 giving 150.7966 cuin and 2.4711 litres. The AMC4 is 3.875x3.1875 giving 150.364cuin and 2.464 litres. Ken Ames Quoting Jim Blair <carnuck@xxxxxxxxxxx>: > A: Okay, the GM motor is 2.5L and the AMC motor is 2.46? > > > From: TABunsey@xxxxxxx > Subject: Re: AMC 2.5 only used in Jeeps, right? RIGHT...almost > To: mail@xxxxxxxxxxxx > Message-ID: <ADVANCES62s5tKE6zeI000013aa@xxxxxxxxxxxxxxxxxxxxxxx> > > John: > > You're mostly right. > > Per my AMC Parts books and 1983 Service Manual Supplement, AMC introduced > the 150 (AMC) engine in mid-year 1983, at which time it replaced the Pontiac > > "Iron Puke" 151 engine. AMc never bothered to tool up a 150 install for the > Concords & Spirits because they were already slated to cease production at > the end of the model year (And, for 1983 the AMC 258 was the standard > powerplant in the Concord/Spirit anyway). > > The AMC 150 became the base engine for 1984 Eagles, but the 4-cylinder was > dropped for the 1985 model year due to poor sales, as less than 200 Eagles > were sold in 1984 with the 4-cylinder. It simply wasn't worth the production > > line hassles for such miniscule sales. > > I have seen several 1983 SX-4s with the AMC 4-cylinder. Actually, I would > like to find one as a future collectable. > > > Tom Bunsey > > > >