Antrim 20 Information, Review, Specs

Sailing Performance & Handling

The Antrim 20 is frequently described as a "pocket rocket," specifically optimized for light to medium air. With a displacement-to-length (D/L) ratio of approximately 154, it sits firmly in the "light racer" category, allowing for rapid acceleration and a lively feel on the helm. Its performance is driven by a powerful fractional sloop rig with a sail area-to-displacement (SA/Disp) ratio of approximately 24, which places it among the most aggressively rigged boats in its size class. According to historical reviews in Cruising World, the design was noted for its "enormous rig" and "exciting" performance, effectively setting trends for future sportboat designs.

Handling is characterized by dinghy-like responsiveness. The deep fin keel provides sufficient righting moment to carry the large sail plan in light conditions, but the boat's broad, shallow hull and high SA/Disp ratio mean it requires active crew management as the wind increases. In a blow, the Antrim 20 can become quite tender; owner anecdotes and technical reviews suggest that the boat "needs a big crew to keep her on her feet" or requires reefing significantly earlier than more traditional 20-footers. Tracking is aided by the high-aspect-ratio keel, though the boat is most rewarding for sailors who enjoy active trimming and weight positioning.

Interior Comfort & Variations

Despite its small footprint, the Antrim 20 was designed with a "workable interior" that distinguishes it from pure daysailers. The layout includes sleeping accommodations for up to four people, featuring a double V-berth forward and two quarter berths extending under the cockpit. The cabin provides approximately 52 inches of headroom, which, while limited to sitting height, offers more utility than many modern 20-foot sportboats.

A minimalist galley is typically located to port with a pull-out stove, balanced by a sink on the starboard side. Storage is integrated beneath the berths, and a portable head is usually situated under the forward V-berth. The most notable sibling model is the Ultimate 20, which was a 1994 redesign commissioned by Jeff Canepa. While the Ultimate 20 utilized essentially the same hull form (derived from the earlier Hotfoot 20), it moved toward a sportier configuration with a lifting keel and a retractable bowsprit for an asymmetric spinnaker, sacrificing some of the original 20's interior "cruising" amenities for raw speed and easier trailering.

Known Issues & Buyer’s Checklist

Prospective buyers of this vintage design should focus on the following technical areas:

• Keel Attachment and Sump: Given the high righting moments generated by the deep fin keel on a relatively light hull, the keel trunk and internal grid should be inspected for stress cracking or evidence of "hard grounding" repairs.
• Rigging Tension: The original aluminum masts were occasionally prone to over-stressing if sailed with heavy crew weights in high winds. Check for deformation at the spreaders and mast base.
• Deck Core Integrity: Like many fiberglass boats of the 1980s, the Antrim 20 uses a cored deck. Use a phenolic hammer to check for delamination around high-load areas like the chainplates and winch bases.
• Trailer Compatibility: The original Antrim 20 often featured a fixed fin keel with a four-foot draft. This makes ramp launching significantly more difficult than the later Ultimate 20 (which has a lifting keel). Ensure the trailer is specifically configured with a deep enough drop or a tongue extension.

Community & Resources

While there is no dedicated class association specifically for the 1982 Antrim 20, much of the technical and community support is found through the Ultimate 20 Class Association. Because the boats share hull similarities and the same designer, the U20 community is the primary resource for rigging upgrades and structural maintenance advice. Documentation and historical context are also maintained by Antrim Associates Naval Architects.

The Verdict

Pros

• Exceptional light-air performance that outpaces most boats in the 20-foot range.
• A true "crossover" design that offers basic overnighting capabilities in a high-performance package.
• High-quality design pedigree from Jim Antrim, ensuring balanced handling.

Cons

• Relatively unstable in heavy air without a full crew or early reefing.
• Fixed deep keel makes trailering and ramp launching a logistical challenge.
• Limited production numbers make finding spare parts or a "sister-ship" community difficult.