Design and Construction
Alo Yachts built the 33 with a solid fiberglass hull and an iron fin keel. Draft ranges from 5.58 to 5.88 feet, depending on load. The boat displaces roughly 10,800 pounds and carries 4,189 pounds of iron ballast, giving a ballast ratio of nearly 39 percent.
A length-to-beam ratio of 3.21 points to a moderately beamy, firmly ballasted cruiser rather than a lithe racer. The displacement-length ratio is 301, placing the Alo 33 among what the design data call “heavy cruisers.” Its wetted surface of about 290 square feet is consistent with that steady, volume-carrying character.
A notable feature of the production history is that some boats were home-completed, which means quality may vary. Finish and structural details can therefore differ from one hull to another.
Rig, Sailing Characteristics, and Power
The Alo 33 carries a masthead sloop rig. Its reference mainsail-and-jib area is 458.8 square feet, producing a sail-area-to-displacement ratio of 15.2 with the ISO reference sail and 18.1 with a 135 percent genoa.
Together with a theoretical displacement hull speed of 6.6 knots and a Relative Speed Performance index of 42, those figures describe a boat with adequate, though not sparkling, light-air potential and a comfortable turn of speed in a breeze.
The capsize screening value is 1.82, while the Motion Comfort Ratio ranges from 22.0 to 29.3. These figures frame the Alo 33 as a stable, tolerable sea boat for its size.
The recommended Volvo Penta MD2B diesel produces 25 horsepower through a shaft drive. Maximum speed under engine is 7.0 knots, modestly above the boat’s sailing hull speed.
Accommodations and Tankage
Below, the Alo 33 has a single cabin with eight berths, along with a galley and toilet facility. Teak faces the interior, as it does on many boats of the period.
The one-cabin, eight-berth layout is better suited to weekending groups or coastal crews than to owners seeking private cabins. The teak joinery gives the accommodation a distinctly period character.
Fresh-water capacity is 120 liters, waste-water capacity is 80 liters, and the diesel tank holds 90 liters.
Known Issues
The main caveat is the home-completion option, which introduced variability in build quality across the small fleet. Because some boats were home-completed, quality may vary. Buyers and reviewers should therefore assess each hull on its own merits rather than assume consistent yard standards.
Refits and Ownership
Given the small production run and the home-completion option, owning an Alo 33 is less about relying on fleet support and more about caring for an individual boat.
The original running-rigging specifications provide a useful template for renewal. Mainsail and headsail halyards are specified at 29.5 meters of 10-millimeter line, while sheets run from around 10 to 25 meters in 12-millimeter line, supplemented by assorted control lines.
The Volvo Penta MD2B remains a straightforward diesel to source parts for, while the simple shaft-drive transmission avoids the complexity of more modern saildrives.
The Verdict
The Alo 33 is a compact, heavily built Norwegian cruiser with a sensible masthead rig and a practical, if communal, interior. Its rarity and home-completion history mean condition can vary widely, but the underlying design is coherent and seaworthy within the small-cruiser class.
Pros
- Firmly ballasted iron fin keel with a ballast ratio of nearly 39 percent
- Stable motion and capsize-screening figures suited to coastal cruising
- Clear original rigging specifications for straightforward renewal
Cons
- Fewer than 100 built, with some home-completed, so quality is inconsistent
- Single cabin and eight berths limit privacy
- Modest sail-area-to-displacement ratio under the reference rig
