The Beneteau Cyclades 50.4 2007 vs Beneteau Idylle 10.50 1985 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.
The power gap is worth calling out. Rated to 110 hp, the Beneteau Cyclades 50.4 2007 has a 82-hp advantage over the Beneteau Idylle 10.50 1985's 28-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Beneteau Cyclades 50.4 2007 carries 105 gallons versus 24 gallons in the Beneteau Idylle 10.50 1985. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.
For family outings this is probably the sharpest distinction between the two. The Beneteau Cyclades 50.4 2007 is rated for 15 passengers, while the Beneteau Idylle 10.50 1985 caps at 10. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Beneteau Cyclades 50.4 2007 could be the deciding factor.
The Beneteau Idylle 10.50 1985 has a documented displacement of 10 141 lbs. Displacement data wasn't available for the other boat in this comparison.
Draft is a practical consideration that many buyers underestimate until they're already at the marina. The Beneteau Cyclades 50.4 2007 draws 6,5 ft, compared to 4,1 ft for the Beneteau Idylle 10.50 1985. 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.
For auxiliary power the Beneteau Cyclades 50.4 2007 carries a 110-hp engine against 28 hp on the Beneteau Idylle 10.50 1985. Motoring range and ability to punch through a foul current or enter a tight marina under power will favour the more powerful installation.
For extended cruising, water capacity matters: the Beneteau Cyclades 50.4 2007 carries 258 gallons versus 61 gallons on the Beneteau Idylle 10.50 1985 — a significant advantage on longer passages where watermaker or provisioning stops aren't guaranteed.
Bottom line: The Beneteau Cyclades 50.4 2007 at 51,3 ft offers more living space, greater range, and a more substantial offshore capability. The Beneteau Idylle 10.50 1985 at 34,5 ft is the easier, lower-cost option — simpler to crew and a strong choice for coastal and day sailing.