Design and Construction
The hull form is a sloop with beautiful, rounded sections that keep wetted surface low low wetted surface, and both the beam at the waterline and the beam at the stern are moderate rather than exaggerated. With a displacement of 23,000 pounds on that 34-foot-6-inch waterline, the 45 carries the volume required for a comfortable layout for two couples and the speed and stability for some ambitious cruises. The boat was built on a semi-custom basis, so the drawings show a range of proposed options and final details rely upon owner requirements — a defining character of the class rather than a production-line uniformity.
Keel and Draft Options
Alden offered either a deep-draft fin keel or a fin/bulb shoal keel, and the two can be interchanged at the yard in two hours with all work done on the exterior. The deep fin draws 7 feet 5 inches and carries 10,000 pounds of ballast for a displacement-to-length ratio of 250; the shoal fin/bulb draws 5 feet 9 inches, places a very low vertical center of gravity, carries 11,000 pounds of ballast, and raises the D/L to 261. The shoal option's low VCG is a deliberate stability trade for reduced draft.
Rig and Handling
Rig options span a tall, triple-spreader rig intended for IMS racing and a shorter, double-spreader rig aimed at cruising, though both use inline lowers with a babystay. The mainsheet traveler is positioned well forward to keep it clear of the cockpit, and a short foretriangle keeps headsails small — a useful trait for short-handed sail handling. The 915 square feet of sail area yields a SA/D of 18.10 on the fin keel and 17.59 on the shoal keel, consistent with a moderate-performance cruiser rather than a lightweight racer.
Accommodations
The interior volume supports a comfortable layout for two couples, and one item common to every layout is the engine box that forms part of the galley counter area. Testers praised layout C with its pilotberths, while layout B offers a single head and larger galley — options that illustrate how owner requirements shaped final details. The traditional stern variant gives a few extra feet of deck space aft of the cockpit, though it carries more weight aft and additional overall length that does not contribute to sailing length; the transom itself is an attractive shape on either version.
The Verdict
The Alden 45 is a thoughtfully engineered semi-custom cruiser that balances classic East Coast styling with modern predictive design. Its interchangeable keel system is a genuine differentiator, letting an owner tailor draft and stability to cruising grounds without structural surgery. The semi-custom process means no two boats are spec-for-spec identical, which rewards careful survey but complicates apples-to-apples comparison.
Pros
- Interchangeable fin and fin/bulb shoal keels swappable in two hours, exterior-only
- Low wetted-surface hull with moderate beam and rounded sections for efficiency
- Semi-custom layouts including pilotberth and larger-galley variants
- Small headsails via short foretriangle ease crew workload
Cons
- Traditional stern adds weight aft and non-sailing length
- Final details vary by owner, demanding thorough individual survey
- Shoal keel raises D/L to 261, softening performance versus deep fin
