The Beneteau Antares 13.80 2008 vs Beneteau First 51 1986 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 Beneteau First 51 1986 tops out at 80 hp. Engine specs for the Beneteau Antares 13.80 2008 aren't listed — confirm with a dealer before selecting an outboard.Fuel capacity breaks the other way: the Beneteau Antares 13.80 2008 carries 396 gallons versus 185 gallons in the Beneteau First 51 1986. 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 First 51 1986 is rated for 15 passengers, while the Beneteau Antares 13.80 2008 caps at 13. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Beneteau First 51 1986 could be the deciding factor.

The Beneteau First 51 1986 has a documented displacement of 28 660 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 First 51 1986 draws 9,2 ft, compared to 3,0 ft for the Beneteau Antares 13.80 2008. That 6,2-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 First 51 1986 has a documented auxiliary engine of 80 hp.

For extended cruising, water capacity matters: the Beneteau Antares 13.80 2008 carries 169 gallons versus 74 gallons on the Beneteau First 51 1986 — a significant advantage on longer passages where watermaker or provisioning stops aren't guaranteed.