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.