GR 28 Information, Review, Specs

Sailing Performance & Handling

The sailing characteristics of the GR 28 are defined by its stiffness and its ability to maintain momentum in heavy air. With a displacement-to-length ratio that leans toward the moderate-heavy end of the spectrum, the boat offers a stable and predictable motion at sea. Technical assessments from historical registries, such as those maintained by the Japan Sailing Federation (JSAF), indicate that the boat was designed with a ballast ratio near 40%, which is high for a 28-foot production boat. This translates to a vessel that "stands up" well to its canvas, often delaying the need to reef until winds exceed 18–20 knots.

Under sail, the GR 28 tracks exceptionally well due to the profile of its deep fin keel. Owners often report that the helm remains light and responsive even when pressed hard on a reach. However, like many designs from the late 70s with a shorter waterline and a traditional masthead rig, the boat requires active mainsail trimming to prevent weather helm in gusty conditions. While it is not a "light-air flyer," its performance in moderate breeze is respectable, particularly when equipped with a large overlapping genoa, which serves as the primary engine for this hull type.

Interior Comfort & Variations

Inside, the GR 28 offers a surprisingly voluminous living space for a vessel of its length, utilizing a nearly 9-foot beam to maximize social areas. The interior joinery typically features extensive use of teak or mahogany veneers, a hallmark of the Great River shipyard's commitment to craftsmanship. The standard layout includes a traditional V-berth forward with an overhead hatch for ventilation, followed by a full-width head compartment. The main salon consists of two longitudinal settees with a central folding table, providing enough seating for four adults.

The galley is usually situated to the starboard side of the companionway, featuring a deep sink and a top-loading icebox, while a dedicated navigation station is positioned to port. Variations of the model were primarily limited to the "Sibling" range; while the GR 28 served as the mid-sized flagship, the GR 24 offered a more trailerable, simplified version, and the GR 31 provided a significant upgrade in standing headroom and fuel capacity for offshore work. On the 28-foot model, headroom is approximately 5'10", which accommodates most sailors but may feel tight for taller crew members.

Known Issues & Buyer’s Checklist

Prospective buyers of a GR 28 should prioritize the following technical inspections, synthesized from regional owner technical forums and historical surveyor notes:

• Osmotic Blistering: Like many early-generation GRP (Glass Reinforced Plastic) boats from the 1970s, the GR 28 is prone to osmosis. A professional moisture meter test on the hull below the waterline is essential, especially for boats that have been kept in warmer, tropical waters for extended periods.
• Mast Step Compression: The GR 28 features a deck-stepped mast. Over decades of high rig tension, the compression post or the deck core beneath the mast step can deteriorate. Check for "crushing" or hairline fractures in the gelcoat around the base of the mast.
• Engine Serviceability: Most original units were fitted with Yanmar or Bukh diesel engines. While these are reliable, parts for the specific early models (such as the Yanmar 2GM) are becoming harder to source in certain regions. Inspect the engine mounts and the shaft seal, as access can be cramped in the 28-foot engine box.
• Chainplate Bedding: The stainless steel chainplates are through-bolted to the bulkheads. Leakage here is a common "gotcha" that can lead to rot in the structural plywood bulkheads. Check for water staining or delamination on the wood where the chainplates enter the cabin.

The Verdict

The GR 28 remains a stout, well-regarded classic for sailors who value structural integrity and traditional aesthetics over modern, "beamy" interior volumes. It is an ideal entry-level keelboat for coastal exploration or local handicap racing.

Pros

• Exceptional Build Quality: The hand-laid GRP hull is significantly thicker than many contemporary mass-produced boats.
• Balanced Handling: Stiff and predictable in heavy weather, providing confidence to less experienced crews.
• Classic Aesthetics: Features high-quality interior woodwork that is rare in modern 28-footers.

Cons

• Limited Headroom: Taller sailors will find the 5'10" clearance restrictive in the galley and head.
• Maintenance Intensive: Older teak-heavy interiors and aging deck hardware require consistent upkeep.
• Light Air Performance: The moderate displacement means the boat can feel sluggish in winds under 8 knots without a spinnaker.