Beneteau First Class 12 1986 boat specs
Beneteau
Beneteau First Class 12 1986
1986
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VS
Beneteau Idylle 11.50 Fin keel 1983 boat specs
Beneteau
Beneteau Idylle 11.50 Fin keel 1983
1983
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Beneteau First Class 12 1986 vs Beneteau Idylle 11.50 Fin keel 1983 — Same Brand, Different Boat

The Beneteau First Class 12 1986 vs Beneteau Idylle 11.50 Fin keel 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.

On paper these two are close siblings in the size department — Beneteau First Class 12 1986 at 39,3 ft versus Beneteau Idylle 11.50 Fin keel 1983 at 37,8 ft. Weight tells a clearer story for trailering families: the Beneteau Idylle 11.50 Fin keel 1983 tips the scales at 11 464 lbs — 1 984 lbs less than the Beneteau First Class 12 1986 at 9 480 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.

The Beneteau Idylle 11.50 Fin keel 1983 tops out at 50 hp. Engine specs for the Beneteau First Class 12 1986 aren't listed — confirm with a dealer before selecting an outboard.

Both boats are rated for 11 passengers — a good fit for a family of four or five plus guests. Comfort at capacity is another matter; the longer hull typically means more seat options and better weight distribution.

Both boats sit in a similar displacement bracket — 9 480 lbs for the Beneteau First Class 12 1986 and 11 464 lbs for the Beneteau Idylle 11.50 Fin keel 1983. Comparable displacement means broadly similar seakeeping behaviour and load capacity, though hull form and ballast ratio will still produce noticeably different sailing characteristics.

Draft is a practical consideration that many buyers underestimate until they're already at the marina. The Beneteau First Class 12 1986 draws 6,9 ft, compared to 4,5 ft for the Beneteau Idylle 11.50 Fin keel 1983. That 2,4-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.

The Beneteau Idylle 11.50 Fin keel 1983 has a documented auxiliary engine of 50 hp.

Bottom line: The Beneteau First Class 12 1986 and Beneteau Idylle 11.50 Fin keel 1983 are closely matched on paper. A sea trial on both in representative conditions is the only reliable way to find which one suits your sailing style, home port, and intended cruising ground.
Measurements / Dimensions
Length overall - Detail39.33 ft
Length overall - Detail37.80 ft
Length - Feet39.33
Length - Feet37.8
Length overall - Meters11.99
Length overall - Meters11.52
Length overall - Inches472
Length overall - Inches454
Beam12.47 ft
Beam12.10 ft
Beam - Meters3.8
Beam - Meters3.69
Beam - Inches150
Beam - Inches145
Draft [max] - Detail6.89 ft
Draft [max] - Detail4.50 ft
Draft [max] - Meters2.1
Draft [max] - Meters1.37
Draft [max] - Inches83
Draft [max] - Inches54
Displacement9480.00 lbs
Displacement11464.00 lbs
Operational Info
Boat typeSail
Boat typeSail
Sleeping capacitynot available
Sleeping capacity6
Cabinsnot available
Cabins2
Headnot available
Head1
Water capacitynot available
Water capacity105.7
Riggingnot available
RiggingSloop
Mast Configurationnot available
Mast ConfigurationDeck stepped mast
Body / Hull
Ruddernot available
Rudder1 rudder on skeg
Helmnot available
Helm1 wheel
Engine and Drivetrain
Fuel tank capacity - Galnot available
Fuel tank capacity - Gal21.1
Fuel tank capacity - Litersnot available
Fuel tank capacity - Liters79.87
Horsepowernot available
Horsepower50 hp
Fuel typenot available
Fuel typeDiesel
Drive typenot available
Drive typeinboard
Performance
Maximum speednot available
Maximum speed7.2
Maximum speed measurenot available
Maximum speed measureknots

Beneteau First Class 12 1986 vs Beneteau Idylle 11.50 Fin keel 1983 — Common Questions

Which is the larger boat — the Beneteau First Class 12 1986 or the Beneteau Idylle 11.50 Fin keel 1983?
The Beneteau First Class 12 1986 is the longer of the two at 39,3 feet overall. The Beneteau Idylle 11.50 Fin keel 1983 comes in at 37,8 feet, making it roughly 1,5 ft shorter — a meaningful difference in deck room and overall on-water presence.
Which is easier to trailer — the Beneteau First Class 12 1986 or the Beneteau Idylle 11.50 Fin keel 1983?
For trailering, the Beneteau First Class 12 1986 has the edge at 9 480 lbs dry weight versus 11 464 lbs for the Beneteau Idylle 11.50 Fin keel 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.
What is the maximum horsepower rating for these boats?
The Beneteau Idylle 11.50 Fin keel 1983 has a documented max rating of 50 hp. Engine specifications for the Beneteau First Class 12 1986 were not available in our database — check the OEM spec sheet or manufacturer's website for confirmation.
How many people can each boat hold?
The Beneteau First Class 12 1986 is Coast Guard rated for 11 passengers, while the Beneteau Idylle 11.50 Fin keel 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 Beneteau First Class 12 1986 or the Beneteau Idylle 11.50 Fin keel 1983?
The Beneteau First Class 12 1986 has the deeper draft at 6,9 ft, versus 4,5 ft for the Beneteau Idylle 11.50 Fin keel 1983. 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 Beneteau First Class 12 1986 or the Beneteau Idylle 11.50 Fin keel 1983 better suited for offshore sailing?
For offshore work, displacement and construction are the primary indicators. The Beneteau Idylle 11.50 Fin keel 1983 at 11 464 lbs displacement is the heavier, more load-carrying design — generally better suited to extended passages where seakeeping and provisioning capacity matter most. The Beneteau First Class 12 1986 at 9 480 lbs will typically be livelier and more responsive in lighter conditions.
Which boat is wider, and does it affect trailering?
The Beneteau First Class 12 1986 measures 150" wide, compared to 145" for the Beneteau Idylle 11.50 Fin keel 1983. 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.
Are the Beneteau First Class 12 1986 and Beneteau Idylle 11.50 Fin keel 1983 from the same manufacturer?
Yes — both the Beneteau First Class 12 1986 and the Beneteau Idylle 11.50 Fin keel 1983 are built by Beneteau. 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.