The Jeanneau Attalia 1983 vs Jeanneau Symphonie 1978 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 — Jeanneau Attalia 1983 at 31,1 ft versus Jeanneau Symphonie 1978 at 31,2 ft. Weight tells a clearer story for trailering families: the Jeanneau Symphonie 1978 tips the scales at 11 321 lbs — 1 731 lbs less than the Jeanneau Attalia 1983 at 9 590 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.
Both boats share a closely matched power ceiling — 18 hp for the Jeanneau Attalia 1983 and 22 hp for the Jeanneau Symphonie 1978. Real-world performance will come down more to which motor is actually bolted on, its load at the time, and whether it's a 4-stroke or 2-stroke setup. Fuel capacity breaks the other way: the Jeanneau Symphonie 1978 carries 17 gallons versus 12 gallons in the Jeanneau Attalia 1983. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.
Both boats are rated for 9 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 — 9 590 lbs for the Jeanneau Attalia 1983 and 11 321 lbs for the Jeanneau Symphonie 1978. Comparable displacement means broadly similar seakeeping behaviour and load capacity, though hull form and ballast ratio will still produce noticeably different sailing characteristics.
Both boats draw a similar depth — 5,8 ft and 6,2 ft respectively. Marina access and anchorage options should be broadly equivalent between the two.
The Jeanneau Attalia 1983 uses Sloop rigging.
Hull speed is rated at 6,9 knots for the Jeanneau Symphonie 1978 and 6,7 knots for the Jeanneau Attalia 1983.
Bottom line: The Jeanneau Attalia 1983 and Jeanneau Symphonie 1978 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.