The Beneteau First 34.7 2005 vs Beneteau Oceanis 510 1994 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 80 hp, the Beneteau Oceanis 510 1994 has a 59-hp advantage over the Beneteau First 34.7 2005's 21-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 Oceanis 510 1994 carries 148 gallons versus 20 gallons in the Beneteau First 34.7 2005. 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 Oceanis 510 1994 is rated for 15 passengers, while the Beneteau First 34.7 2005 caps at 10. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Beneteau Oceanis 510 1994 could be the deciding factor.

The Beneteau Oceanis 510 1994 has a documented displacement of 30 864 lbs. Displacement data wasn't available for the other boat in this comparison.

Both boats draw a similar depth — 6,7 ft and 5,9 ft respectively. Marina access and anchorage options should be broadly equivalent between the two.

The Beneteau First 34.7 2005 is rigged as a Sloop while the Beneteau Oceanis 510 1994 carries Masthead-sloop rigging — a meaningful difference in sail handling complexity, upwind performance, and the size of crew you'll need to work the boat comfortably. For auxiliary power the Beneteau Oceanis 510 1994 carries a 80-hp engine against 21 hp on the Beneteau First 34.7 2005. 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 Oceanis 510 1994 carries 264 gallons versus 26 gallons on the Beneteau First 34.7 2005 — a significant advantage on longer passages where watermaker or provisioning stops aren't guaranteed.