The Hallberg - Rassy 340 2017 vs Hallberg - Rassy 342 2010 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 — Hallberg - Rassy 340 2017 at 35,1 ft versus Hallberg - Rassy 342 2010 at 33,1 ft. Weight tells a clearer story for trailering families: the Hallberg - Rassy 340 2017 tips the scales at 13 145 lbs — 1 445 lbs more than the Hallberg - Rassy 342 2010 at 11 700 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 — 29 hp for the Hallberg - Rassy 340 2017 and 29 hp for the Hallberg - Rassy 342 2010. 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 Hallberg - Rassy 340 2017 carries 50 gallons versus 44 gallons in the Hallberg - Rassy 342 2010. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.
Both boats are rated for 10 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 — 13 145 lbs for the Hallberg - Rassy 340 2017 and 11 700 lbs for the Hallberg - Rassy 342 2010. 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 — 6,2 ft and 6,0 ft respectively. Marina access and anchorage options should be broadly equivalent between the two.
The Hallberg - Rassy 340 2017 uses Sloop rigging. Helm style differs too: the Hallberg - Rassy 340 2017 uses a 2 wheels versus a 1 tiller on the Hallberg - Rassy 342 2010. Wheel helms give better leverage and visibility on larger boats; tillers offer direct feedback and simplicity on smaller ones.
Hull speed is rated at 7,7 knots for the Hallberg - Rassy 340 2017 and 7,3 knots for the Hallberg - Rassy 342 2010. For extended cruising, water capacity matters: the Hallberg - Rassy 340 2017 carries 73 gallons versus 7 gallons on the Hallberg - Rassy 342 2010 — a significant advantage on longer passages where watermaker or provisioning stops aren't guaranteed.
Bottom line: The Hallberg - Rassy 340 2017 and Hallberg - Rassy 342 2010 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.