M42 / M44 - Differences? Preferences? M42 - OBD I - 1,796 cc - 84 mm bore - 81 mm stroke - 10.0:1 compression ratio - 138 hp @ 6,000 rpm - 129 ft-lb @ 4,500 rpm M44 - OBD II - 1,895 cc - 85 mm bore - 83.5 mm stroke - 10.0:1 compression ratio - 138 hp @ 6000 RPM - 133 lb-ft @ 4300 RPM |