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Antrim 27
Designer: Jim Antrim  ·  Builder: Ultimate Sailboats Internation  ·  First built: 1996
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About the Antrim 27

Designed by renowned naval architect Jim Antrim and built by Ultimate Sailboats International starting in 1996, this 28-foot performance cruiser strikes an impressive balance between speed and versatility. The boat's most distinctive feature is its innovative lifting keel configuration, which retracts to reduce the standard 6-foot draft for shallow-water exploration while maintaining excellent upwind performance when fully deployed. With its fractional sloop rig and fiberglass construction, the Antrim 27 delivers spirited sailing characteristics that appeal to both weekend cruisers and club racers. The generous sail area of 489 square feet combined with a relatively light 2,600-pound displacement creates a responsive boat that accelerates quickly in light air and maintains good speed across various wind conditions. The design's low comfort ratio of 8.31 reflects its performance-oriented nature rather than traditional cruising accommodations, while the capsize screening value of 2.69 indicates good stability for coastal sailing adventures. The lifting keel system makes this boat particularly attractive for sailors who want to explore gunkholes and shallow anchorages without sacrificing sailing performance, making it well-suited for coastal cruising, day sailing, and light recreational racing in protected waters.

Core Dimensions
LOA (Length Overall) 27.83 ft / 8.48 m
LWL (Waterline Length) 23.75 ft / 7.24 m
Beam 9.25 ft / 2.82 m
Max Draft 6.00 ft / 1.83 m
Min Draft 3.33 ft / 1.01 m
Displacement 2,600.00 lb / 1,179 kg
Ballast 1,050.00 lb / 476 kg
Sail Area (Reported) 489.00 ft² / 45.43 m²
Design & Construction
Hull Type Lifting Keel
Rigging Type Fractional Sloop
Construction FG
Designer Jim Antrim
Builder Ultimate Sailboats Internation
First Built 1996
Associations Ultimate 27
Related Sailboats ["Ultimate 27" · "Pogo 850" · "Parker 275" · "Banner 28" · "Precision 28"]
Owner Reviews

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Performance Ratios
PHRF Rating PHRF (Performance Handicap Racing Fleet) is a national racing handicap measured in seconds per nautical mile. Lower values indicate faster boats. Ratings are sourced from US Sailing's national database (median across 60+ regional fleets).
Under 0 — Ultralight racer0–90 — Performance racer90–150 — Cruiser/racer150–210 — Typical cruiserOver 210 — Heavy/slow cruiser
 87
SA/Displacement Sail Area to Displacement ratio measures how much sail power a boat has relative to its weight. Higher values mean more performance and speed.
Under 14 — Heavy cruiser, slow14–18 — Cruising sailboat18–22 — Cruiser/racerOver 22 — Performance racer
 41.48
Ballast/Displacement Ballast to Displacement ratio shows what percentage of the boat's total weight is ballast. Higher values generally mean better initial stability and stiffer sail carrying.
30–35% — Typical cruiser35–45% — Stiff performance boatOver 45% — Racing oriented
 40.38
Displacement/Length Displacement to Length ratio measures how heavy a boat is relative to its waterline length. Lower values mean a lighter, faster boat.
Under 100 — Ultralight racer100–200 — Light cruiser/racer200–300 — Moderate cruiser300–400 — Heavy cruiserOver 400 — Very heavy
 86.64
Comfort Ratio Ted Brewer's Comfort Ratio predicts how comfortable a boat will feel in offshore conditions. Higher values mean a steadier, more comfortable motion in a seaway.
Under 20 — Uncomfortably rough20–30 — Acceptable coastal30–40 — Good offshore comfortOver 40 — Very comfortable offshore
 8.31
Capsize Screening Formula The USHS Capsize Screening Formula estimates offshore capsize risk. Lower is safer — values under 2.0 are considered acceptable for offshore sailing.
Under 2.0 — Safe for offshore2.0–2.2 — Borderline offshoreOver 2.2 — Coastal use recommended
 2.69
Hull Speed Hull Speed is the theoretical maximum speed of a displacement hull, calculated from waterline length. Most cruising sailboats reach this speed in moderate conditions. 6.53 kn
Pounds/Inch Immersion Pounds per Inch Immersion (PPI) tells you how much weight is needed to sink the boat one inch. Useful for calculating how additional gear and stores affect waterline. 784.97 pounds/inch
Engine & Accommodations
Engine Make Outboard
How It Compares

vs. Banner 28, Parker 275, Pogo 850

This boat Similar boats
Dimensions
LOA
Antrim 27 ★
27.8 ft
Banner 28
28.0 ft
Parker 275
27.9 ft
Pogo 850
27.9 ft
LWL
Antrim 27 ★
23.8 ft
Banner 28
20.0 ft
Parker 275
24.5 ft
Pogo 850
27.2 ft
Beam
Antrim 27 ★
9.3 ft
Banner 28
9.7 ft
Parker 275
9.3 ft
Pogo 850
11.8 ft
Displacement
Antrim 27 ★
2 lbs
Banner 28
2 lbs
Parker 275
5 lbs
Pogo 850
6 lbs
Ballast
Antrim 27 ★
1 lbs
Banner 28
1 lbs
Parker 275
2 lbs
Pogo 850
1 lbs
Sail Area
Antrim 27 ★
489 sq ft
Banner 28
374 sq ft
Parker 275
380 sq ft
Pogo 850
560 sq ft
Performance
PHRF Rating (lower = faster)
Antrim 27 ★
87 s/nm
Banner 28
128 s/nm
Parker 275
—
Pogo 850
—
SA / Displacement (higher = more powerful)
Antrim 27 ★
41.5
Banner 28
32.1
Parker 275
19.6
Pogo 850
26.7
Ballast / Disp (higher = stiffer)
Antrim 27 ★
40.4 %
Banner 28
51.8 %
Parker 275
—
Pogo 850
30.4 %
Comfort Ratio (higher = more comfortable offshore)
Antrim 27 ★
8.3
Banner 28
8.6
Parker 275
17.2
Pogo 850
13.0
Capsize Screening (lower = safer)
Antrim 27 ★
2.69
Banner 28
2.83
Parker 275
2.10
Pogo 850
2.58
Displacement / Length (lower = lighter)
Antrim 27 ★
86
Banner 28
142
Parker 275
—
Pogo 850
136
Hull Speed
Antrim 27 ★
6.5 kts
Banner 28
6.0 kts
Parker 275
6.6 kts
Pogo 850
7.0 kts
Speed Number (higher = faster)
Antrim 27 ★
—
Banner 28
5.4
Parker 275
3.1
Pogo 850
—
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