Northshore Mg-C27 Information, Review, Specs

Make
Northshore
Model
Mg-C27
Builder
Marine Glass Yachts
Designer
Rob Humphreys
Number Built
Production Year(s)
1985 - ??

The MG-C27 represents a refined chapter in Northshore Yachts' history, marking a transition where the builder integrated the racing pedigree of the MG brand into a more accessible, cruising-oriented package. Designed by the prolific Tony Castro, the MG-C27 was developed to offer a "big boat" feel within a 27-foot frame. Unlike the radical, open-plan MG Spring 25 that preceded it, the C27—where the "C" stands for Cruiser—adopted a more traditional approach to interior volume and deck ergonomics while retaining the slippery, efficient hull lines characteristic of Castro’s performance designs. Built during the late 1980s and early 1990s at the Northshore yard in Itchenor, the vessel benefited from the same high-standard GRP (Glass Reinforced Plastic) construction techniques used for the larger Southerly and Vancouver lines.

Sailing Performance & Handling

The MG-C27 is widely regarded as a "sparky" performer that punches above its weight in light to moderate airs. Its handling characteristics are heavily influenced by its Tony Castro lineage, emphasizing a balanced helm and a hull shape that maintains speed through maneuvers. Most models were produced with a deep fin keel, though a twin-keel version was offered to cater to the drying moorings common on the UK’s East Coast.

The boat’s Displacement/Length ratio suggests a relatively light and responsive hull, which, when paired with a generous fractional rig, allows the MG-C27 to accelerate quickly out of tacks. According to editorial retrospectives by Yachting Monthly, the boat is noted for its predictability; it tracks well and does not exhibit the "twitchiness" often associated with performance-oriented 27-footers of that era. On the wind, it is stiff enough to carry a full press of sail into a Force 4, though early reefing is recommended to maintain optimal heel angles and rudder authority. The cockpit layout is optimized for short-handed sailing, with primary winches within easy reach of the helmsman.

Interior Comfort & Variations

The "Cruiser" designation of the MG-C27 is most apparent once below deck. Northshore abandoned the open-plan, minimalist aesthetic of the MG Spring 25 in favor of a dedicated five- or six-berth layout that prioritizes privacy and storage. The interior is typically finished in light hardwoods and high-quality joinery, a hallmark of Northshore’s craftsmanship.

The layout features a functional L-shaped galley to port and a proper navigation station to starboard—a rarity in modern boats of this size. The main saloon consists of two straight settees with a central folding table, which can often be converted into additional berths. The MG-C27 includes a private aft cabin and a separate heads compartment, features that were considered luxurious for a 27-foot boat at the time of its launch. Headroom is generous, often exceeding 6 feet in the main saloon, which contributes to the "big boat" atmosphere. The MG-C27 also has several siblings built on the same or similar design philosophies, including the MG 30 and the MG 335, though the C27 is often cited as the most manageable for a solo sailor or a young family.

Known Issues & Buyer’s Checklist

When inspecting an MG-C27, prospective buyers should focus on the following technical areas:

  • Rudder Bearings: Like many performance cruisers from the late 80s, the rudder assembly can develop play. Check for any "clunking" or lateral movement in the stock which may indicate worn bushings.
  • Window Seals: The large deck-side windows are known to develop leaks over decades. Look for water staining on the interior woodwork directly below the ports, as resealing these can be a labor-intensive DIY task.
  • Keel-to-Hull Joint: For fin keel models, inspect the GRP area around the keel bolts for "smile" cracks. While the Northshore build quality is generally robust, hard groundings can stress the floor laminate.
  • Engine Maintenance: Most MG-C27s were originally fitted with the Yanmar 1GM10 or Volvo Penta 2000 series. These are reliable engines, but at this age, the exhaust elbows and salt-water cooling passages should be checked for scale buildup and corrosion.
  • Saildrive Seal: If the vessel is equipped with a saildrive rather than a traditional shaft, verify the age of the rubber diaphragm seal; these typically require replacement every 7 to 10 years.

Community & Resources

Owners of the MG-C27 often find support through the Southerly Owners Association, which welcomes owners of all Northshore-built vessels. This group provides a repository of technical manuals and a forum for discussing specific MG-related maintenance. Additionally, the broader Tony Castro design community often features the MG line as a benchmark for 1980s cruiser-racer evolution.

The Verdict

The Northshore MG-C27 is a sophisticated small cruiser that offers a rare blend of performance-oriented design and genuine offshore comfort. It remains a top choice for sailors who want the speed of a racing hull without sacrificing the amenities of a dedicated cruising yacht.

Pros:

  • Exceptional sailing performance and light-air responsiveness.
  • High-quality interior finish consistent with Northshore’s premium brands.
  • Logical, "big boat" layout with a private aft cabin and separate heads.

Cons:

  • Twin-keel versions are less weatherly than the fin-keel variants.
  • Aging engine systems may require significant updates if not well-maintained.
  • Cockpit space can feel slightly cramped when sailing with more than four adults.

Measurements

Construction & Hull

Construction Material
Fiberglass
Hull Type
Monohull Sailboat
Keel Type
Fin
Rudder
1x Transom-Hung
Ballast
2000 lbs
Displacement
6000 lbs
Water Capacity
-
Fuel Capacity
-

Dimensions

Length Overall (LOA)
27.42 ft
Waterline Length (LWL)
23.42 ft
Beam
10 ft
Draft
5 ft
Max Headroom
-
Air Draft
-
Hover over a measurement
IJPE FS LOALWL

Rig & Sails

Rig Type
Fractional Sloop
P (Main Luff)
-
E (Main Foot)
-
I (Foretriangle Height)
-
J (Foretriangle Base)
-
Forestay Length (est)
-
Sail Area
413 sqft

Calculations

Sail Area / Displacement (SA/D) Ratio
20.01
Ballast / Displacement Ratio
33.33
Displacement / Length Ratio (D/L) Ratio
208.52
Comfort Ratio
17.54
Capsize Screening Formula
2.2
Hull Speed
6.48 kn