Westerly Merlin 28 Twin keel Twin keel 1984 boat specs
Westerly
Westerly Merlin 28 Twin keel Twin keel 1984
1984
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VS
Westerly Sealord 39 Sloop Sloop 1983 boat specs
Westerly
Westerly Sealord 39 Sloop Sloop 1983
1983
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Westerly Merlin 28 Twin keel Twin keel 1984 vs Westerly Sealord 39 Sloop Sloop 1983 — Same Brand, Different Boat

The Westerly Merlin 28 Twin keel Twin keel 1984 vs Westerly Sealord 39 Sloop Sloop 1983 comparison sits squarely in the category of decisions where specs alone won't tell the whole story — intended use, storage, and long-term ownership costs all factor in.

Size is the most obvious dividing line here. The Westerly Sealord 39 Sloop Sloop 1983 measures 38,6 feet overall (1983), giving it roughly 9,8 additional feet of deck space compared to the Westerly Merlin 28 Twin keel Twin keel 1984 at 28,8 feet (1984). Weight tells a clearer story for trailering families: the Westerly Sealord 39 Sloop Sloop 1983 tips the scales at 18 501 lbs — 10 465 lbs less than the Westerly Merlin 28 Twin keel Twin keel 1984 at 8 036 lbs. That difference is meaningful if you're working within a half-ton or three-quarter-ton truck's tow rating, especially once you factor in a motor, gear, and fuel.

For family outings this is probably the sharpest distinction between the two. The Westerly Sealord 39 Sloop Sloop 1983 is rated for 11 passengers, while the Westerly Merlin 28 Twin keel Twin keel 1984 caps at 8. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Westerly Sealord 39 Sloop Sloop 1983 could be the deciding factor.

Displacement is where these two sailboats genuinely part ways. The Westerly Sealord 39 Sloop Sloop 1983 displaces 18 501 lbs — a 10 465-lb difference over the Westerly Merlin 28 Twin keel Twin keel 1984 at 8 036 lbs. That gap separates two entirely different categories of sailing: the heavier boat is built for offshore passage-making and load-carrying, while the lighter hull rewards performance sailing and easier handling in lighter air.

Draft is a practical consideration that many buyers underestimate until they're already at the marina. The Westerly Sealord 39 Sloop Sloop 1983 draws 5,6 ft, compared to 3,5 ft for the Westerly Merlin 28 Twin keel Twin keel 1984. That 2,1-foot difference affects which anchorages you can access, which haul-out facilities will take you, and how carefully you need to read the tide tables in shallower cruising grounds.

Helm style differs too: the Westerly Merlin 28 Twin keel Twin keel 1984 uses a 1 tiller versus a 1 wheel on the Westerly Sealord 39 Sloop Sloop 1983. Wheel helms give better leverage and visibility on larger boats; tillers offer direct feedback and simplicity on smaller ones.

Hull speed is rated at 7,6 knots for the Westerly Sealord 39 Sloop Sloop 1983 and 6,5 knots for the Westerly Merlin 28 Twin keel Twin keel 1984. For extended cruising, water capacity matters: the Westerly Sealord 39 Sloop Sloop 1983 carries 131 gallons versus 20 gallons on the Westerly Merlin 28 Twin keel Twin keel 1984 — a significant advantage on longer passages where watermaker or provisioning stops aren't guaranteed.

Bottom line: The Westerly Sealord 39 Sloop Sloop 1983 is the offshore and bluewater choice — at 18 501 lbs displacement and 39 ft it has the load capacity, range, and seakeeping for extended passages. The Westerly Merlin 28 Twin keel Twin keel 1984 at 8 036 lbs is the more nimble, accessible option — easier to single-hand and better suited to coastal and inland sailing.
Measurements / Dimensions
Length overall - Detail28.80 ft
Length overall - Detail38.60 ft
Length - Feet28.8
Length - Feet38.6
Length overall - Meters8.78
Length overall - Meters11.77
Length overall - Inches346
Length overall - Inches463
Beam9.11 ft
Beam13.20 ft
Beam - Meters2.78
Beam - Meters4.02
Beam - Inches109
Beam - Inches158
Draft [max] - Detail3.50 ft
Draft [max] - Detail5.60 ft
Draft [max] - Meters1.07
Draft [max] - Meters1.71
Draft [max] - Inches42
Draft [max] - Inches67
Displacement8036.00 lbs
Displacement18501.00 lbs
Body / Hull
Rudder1 transom hung rudder
Rudder1 spade rudder
Helm1 tiller
Helm1 wheel
Engine and Drivetrain
Fuel tank capacity - Gal21.4
Fuel tank capacity - Gal53.4
Fuel tank capacity - Liters81.01
Fuel tank capacity - Liters202.14
Performance
Maximum speed6.51
Maximum speed7.64
Maximum speed measureknots
Maximum speed measureknots
Operational Info
Water capacity20.1
Water capacity130.8
Mast ConfigurationDeck stepped mast
Mast ConfigurationDeck stepped mast
Boat typeSail
Boat typeSail
Riggingnot available
RiggingSloop

Westerly Merlin 28 Twin keel Twin keel 1984 vs Westerly Sealord 39 Sloop Sloop 1983 — Common Questions

Which is the larger boat — the Westerly Merlin 28 Twin keel Twin keel 1984 or the Westerly Sealord 39 Sloop Sloop 1983?
The Westerly Sealord 39 Sloop Sloop 1983 is the longer of the two at 38,6 feet overall. The Westerly Merlin 28 Twin keel Twin keel 1984 comes in at 28,8 feet, making it roughly 9,8 ft shorter — a meaningful difference in deck room and overall on-water presence.
Which is easier to trailer — the Westerly Merlin 28 Twin keel Twin keel 1984 or the Westerly Sealord 39 Sloop Sloop 1983?
For trailering, the Westerly Merlin 28 Twin keel Twin keel 1984 has the edge at 8 036 lbs dry weight versus 18 501 lbs for the Westerly Sealord 39 Sloop Sloop 1983. Add a motor (typically 300–500 lbs for an outboard in this class), gear, and a partial fuel load and the difference grows. Lighter is friendlier on smaller tow vehicles and on fuel economy while hauling.
How many people can each boat hold?
The Westerly Merlin 28 Twin keel Twin keel 1984 is Coast Guard rated for 8 passengers, while the Westerly Sealord 39 Sloop Sloop 1983 is certified for 11. Note that legal capacity and comfortable capacity aren't always the same thing — on a full day out, most experienced boaters aim for about 80% of the rated number to keep things comfortable.
Which boat has the deeper draft — the Westerly Merlin 28 Twin keel Twin keel 1984 or the Westerly Sealord 39 Sloop Sloop 1983?
The Westerly Sealord 39 Sloop Sloop 1983 has the deeper draft at 5,6 ft, versus 3,5 ft for the Westerly Merlin 28 Twin keel Twin keel 1984. A deeper draft generally means better upwind performance and stability, but limits access to shallow anchorages and some marina berths. Always check the controlling depth of your home port and favourite cruising grounds before committing.
Is the Westerly Merlin 28 Twin keel Twin keel 1984 or the Westerly Sealord 39 Sloop Sloop 1983 better suited for offshore sailing?
For offshore work, displacement and construction are the primary indicators. The Westerly Sealord 39 Sloop Sloop 1983 at 18 501 lbs displacement is the heavier, more load-carrying design — generally better suited to extended passages where seakeeping and provisioning capacity matter most. The Westerly Merlin 28 Twin keel Twin keel 1984 at 8 036 lbs will typically be livelier and more responsive in lighter conditions.
Which is the faster sailboat — the Westerly Merlin 28 Twin keel Twin keel 1984 or the Westerly Sealord 39 Sloop Sloop 1983?
Based on rated hull speed, the Westerly Sealord 39 Sloop Sloop 1983 has an edge at 7,6 knots versus 6,5 knots for the Westerly Merlin 28 Twin keel Twin keel 1984. Keep in mind that actual sailing speed depends heavily on wind conditions, sail trim, bottom condition, and skipper experience — hull speed is a theoretical maximum, not a guarantee.
Which boat is better equipped for long-distance cruising?
For extended passages, fresh water capacity is a key indicator of cruising readiness. The Westerly Sealord 39 Sloop Sloop 1983 carries 131 gallons of fresh water compared to 20 gallons on the Westerly Merlin 28 Twin keel Twin keel 1984 — a meaningful advantage when watermaker installations or port stops aren't guaranteed.
Which boat is wider, and does it affect trailering?
The Westerly Sealord 39 Sloop Sloop 1983 measures 158" wide, compared to 109" for the Westerly Merlin 28 Twin keel Twin keel 1984. The US standard-width towing limit is 8’6" (102") in most states — anything over that may need a wide-load permit. Confirm your specific route requirements with each state's DOT.
Which boat has the larger fuel tank — the Westerly Merlin 28 Twin keel Twin keel 1984 or the Westerly Sealord 39 Sloop Sloop 1983?
The Westerly Sealord 39 Sloop Sloop 1983 has the bigger tank at 53 gallons, versus 21 gallons on the Westerly Merlin 28 Twin keel Twin keel 1984. That 32-gallon difference translates to roughly 96–160 nautical miles of additional range at cruising speed, depending on motor, load, and conditions.
Are the Westerly Merlin 28 Twin keel Twin keel 1984 and Westerly Sealord 39 Sloop Sloop 1983 from the same manufacturer?
Yes — both the Westerly Merlin 28 Twin keel Twin keel 1984 and the Westerly Sealord 39 Sloop Sloop 1983 are built by Westerly. That means shared dealer networks, common parts availability, and consistent build quality across the line. The choice between them is essentially a question of how much boat you need, not which brand you trust.