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Allegro 30
Designer: Lars Olof Norlin  ·  Builder: Allegro Båt Ab (Swe)  ·  First built: 1966
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About the Allegro 30

Designed by renowned Swedish naval architect Lars Olof Norlin and built by Allegro Båt Ab beginning in 1966, this 30-footer represents classic Scandinavian cruising design philosophy. The long keel configuration with its substantial 4,409-pound ballast provides excellent tracking and seakindly motion in rough conditions, making it well-suited for coastal cruising and moderate offshore passages. With a displacement of 8,708 pounds and generous beam of 10.33 feet, the Allegro 30 offers stable sailing characteristics and comfortable interior volume. The masthead sloop rig is straightforward to handle and provides good sailing performance across varying wind conditions. The boat's comfort ratio of 21.3 indicates a motion that favors comfort over speed, while the capsize screening formula of 2.01 suggests reasonable stability for its intended cruising role. The fiberglass construction has proven durable over the decades, and many examples remain actively sailed today. Hull speed calculations show the boat capable of 7.01 knots, respectable for a cruising design of this era. The long keel design trades some maneuverability for directional stability and protection of the propeller and rudder, characteristics that serious cruising sailors often appreciate for their practical benefits during extended voyages.

Core Dimensions
LOA (Length Overall) 30.02 ft / 9.15 m
LWL (Waterline Length) 27.39 ft / 8.35 m
Beam 10.33 ft / 3.15 m
Max Draft 4.66 ft / 1.42 m
Displacement 8,708.00 lb / 3,950 kg
Ballast 4,409.00 lb / 2,000 kg
Ballast Type Iron
Design & Construction
Hull Type Long Keel
Rigging Type Masthead Sloop
Construction FG
Designer Lars Olof Norlin
Builder Allegro Båt AB (SWE)
First Built 1966
Related Sailboats ["Arpege 30 Dufour" · "Contest 30" · "Sagitta 30" · "Yankee 30 Mki" · "Columbia 30"]
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Performance Ratios
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
 50.63
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
 189.19
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
 21.3
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
 2.01
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. 7.01 kn
S# (Speed Number) The Speed Number (S#) is a quick performance index. Higher values indicate a faster, more powerful design relative to its size.
Under 3.0 — Slow cruiser3.0–5.0 — Average cruiser5.0–7.0 — Performance cruiserOver 7.0 — Racer
 3.15
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. 1,010.97 pounds/inch
SA/Displacement (Calc) Calculated Sail Area to Displacement ratio using actual measured sail dimensions rather than reported values. More precise than the reported SA/Disp figure. 19.62
Rig Dimensions
I (Foretriangle Height) 42.70 ft / 13.01 m
J (Foretriangle Base) 12.17 ft / 3.71 m
P (Mainsail Luff) 38.48 ft / 11.73 m
E (Mainsail Foot) 13.38 ft / 4.08 m
SA Fore 259.83 ft² / 24.14 m²
SA Main 257.43 ft² / 23.92 m²
SA Total (100%) 517.26 ft² / 48.06 m²
Est. Forestay Length 44.40 ft / 13.53 m
How It Compares

vs. Contest 30, Sagitta 30, Yankee 30 Mki

This boat Similar boats
Dimensions
LOA
Allegro 30 ★
30.0 ft
Contest 30
30.0 ft
Sagitta 30
30.0 ft
Yankee 30 Mki
30.0 ft
LWL
Allegro 30 ★
27.4 ft
Contest 30
24.9 ft
Sagitta 30
24.1 ft
Yankee 30 Mki
23.0 ft
Beam
Allegro 30 ★
10.3 ft
Contest 30
9.0 ft
Sagitta 30
9.0 ft
Yankee 30 Mki
9.0 ft
Displacement
Allegro 30 ★
8 lbs
Contest 30
8 lbs
Sagitta 30
9 lbs
Yankee 30 Mki
8 lbs
Ballast
Allegro 30 ★
4 lbs
Contest 30
4 lbs
Sagitta 30
4 lbs
Yankee 30 Mki
4 lbs
Sail Area
Allegro 30 ★
—
Contest 30
362 sq ft
Sagitta 30
383 sq ft
Yankee 30 Mki
430 sq ft
Performance
PHRF Rating (lower = faster)
Allegro 30 ★
—
Contest 30
224 s/nm
Sagitta 30
204 s/nm
Yankee 30 Mki
210 s/nm
SA / Displacement (higher = more powerful)
Allegro 30 ★
—
Contest 30
13.6
Sagitta 30
13.9
Yankee 30 Mki
16.3
Ballast / Disp (higher = stiffer)
Allegro 30 ★
50.6 %
Contest 30
45.4 %
Sagitta 30
44.3 %
Yankee 30 Mki
47.5 %
Comfort Ratio (higher = more comfortable offshore)
Allegro 30 ★
21.3
Contest 30
27.6
Sagitta 30
29.6
Yankee 30 Mki
28.7
Capsize Screening (lower = safer)
Allegro 30 ★
2.01
Contest 30
1.75
Sagitta 30
1.72
Yankee 30 Mki
1.75
Displacement / Length (lower = lighter)
Allegro 30 ★
189
Contest 30
254
Sagitta 30
296
Yankee 30 Mki
319
Hull Speed
Allegro 30 ★
7.0 kts
Contest 30
6.7 kts
Sagitta 30
6.6 kts
Yankee 30 Mki
6.4 kts
Speed Number (higher = faster)
Allegro 30 ★
3.2
Contest 30
1.8
Sagitta 30
1.5
Yankee 30 Mki
1.6
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