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differences 259 & 289

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  • differences 259 & 289

    I'v read the difference between the two engines is in the stroke,so that would make the crankshafts diff.It would also seem the camshaft would differ.Rod & main bearings are the same what about bore & piston rods,heads etc.I'm talking factory specs for stock engines ?

    kmul & the $$ eating 63GT

  • #2
    As far as I know the only difference between a 259 and 289 is the crankshaft and the pistons. Because the rods are the same length the piston pin is located higher on the 289. Also on non R series engines the 289 used a dished piston to keep the compression ratio the same as the 259 with flat top pistons.


    • #3
      Like 56 Hawk says...the crank and pistons are the only differences dealing with the cubic inches.

      Your question only asks about 259's and 289's as a displacement question.

      As I'm sure you know...over the years, there were many cams, head castings, pistons, distributors, carburetors, intake manifolds, at least two exhaust manifolds, a few oil pans, water manifolds, valley covers, rocker covers.......need I go on?
      These were all "OEM" changes.