The C&C 27 (MK I-IV) was C&C Yachts most successful model. Almost 1000 were built over a period of nearly 10 years.(Until 1982)
Mark I (hulls 1-167)(shown here)
Mark II (168-452), produced from 1972 to 1974.
Same dimensions as Mark I, except for a taller rig though with same sail area and other minor changes.
Mark III (435-915) was produced from 1974 to 1981. (See C&C 27 MK III)
Rig height was increased again, this time with an increase in sail area. The hull was stretched but beam is the same. Draft was increased and ballast decreased, though the overall displacement remained the same. The rudder took on a higher aspect shape. Smoked acrylic port lights and small changes were made to interior detailing, but the basic layout was untouched. Wheel steering was introduced as an option in 1976. Diesel power became available in 1978, in lieu of the standard Atomic 4 gas engine. Near the end of the Mark III production run, the single-cylinder Yanmar SYP 12 diesel became standard.
Mark IV (916-972) ran from 1981 to 1982.
Same dimensions as Mark III, except the forestay was set back about four inches to accommodate a bow roller (resulting in a reduced 'J' measurement.)
Std. auxiliary power became Yanmar 2GM.
Another versions (similar to C&C 27 MKI) called the TRPPER 500 was built in the UK.
An 'unauthorised', most likely 'splashed', version was built in Germany called the Korneuburg 27 or K 27.