Finngulf 31 Buyer's Guide
Shopping the used market for a Finngulf 31—known in some circles as the Inferno 31—means looking at a 31-foot Södergren-designed cruiser built by Finngulf Marine in Finland from the early 1980s. These are compact teak-interior boats with a lead fin keel, and the fleet’s mixed build history makes a careful per-hull survey essential rather than optional.
Layouts on the Used Market
Every Finngulf 31 on the brokerage scene carries the same fundamental plan: two cabins, six berths, a galley, and a toilet, with teak below anchor. Because the design was also released as a home-completion kit, some resold boats may show amateur finish work while others reflect professional yard completion. Expect the standard early-1980s Scandinavian interior volume for a 31-footer rather than any expanded or alternate factory layout.
Equipment and Common Upgrades
Power comes from a diesel, and the boat left the pattern with different engine alternatives—one documented option is a Volvo Penta 2001 with saildrive, while others may carry an inboard Volvo Penta of unspecified model anchor. Rigging is fractional, with an alternative fractional rig also available, and a 135% genoa brings SA/D to 20.5. For a buyer, the consequence is simple: confirm which Volvo Penta is installed and whether the drive is saildrive or conventional inboard, and verify the actual rig configuration before comparing sail inventories.
What to Inspect
The one documented fleet-wide caveat is the home-completed route: because the Finngulf 31 was sold to be finished by owners, the quality of each boat may vary anchor. On inspection, look closely at the hand-laid fiberglass sandwich hull and deck for consistency of lamination and core integrity, check the stainless-steel fuel tank for corrosion, and confirm keel-to-hull joint soundness on the lead fin. A surveyor should treat each example as a unique build rather than a uniform production run.
Availability and Buyer's Takeaway
These boats surface among early-1980s Finnish fiberglass cruisers. For the buyer, the short checklist is: verify the specific Volvo Penta engine and drive type, confirm rig option and sail-plan SA/D, inspect for home-build variance in structure and finish, and validate keel and tank condition. A well-finished hull is a capable small cruiser; a poorly completed one is a restoration project.
Price & volume trends
Monthly asking-price and listing-volume trends for the Finngulf 31. The line shows the median ask each month; the bars show how many listings appeared.
Monthly breakdown · 1 row
| Month | Listings | Median ask | Δ vs. last mo. |
|---|---|---|---|
| May 26 | 1 | $13,900 | — |
Where they're listed
Finngulf 31 listings appear across 1 country. Germany has the most listings with 1.
Country view
1 listings · 1 country| Country | Median ask | Listings · 12 mo | Active · 90 d | Share |
|---|---|---|---|---|
| Germany | $13,900 | 1 | 0 | 100.0% |
Comparable models
Similar length, displacement, and era. Open a row to compare that model's market page.
Similar boats to compare
2 similar designs| Model | LOA | Median ask | Listings · 12 mo | Active · 90 d |
|---|---|---|---|---|
| Hallberg-Rassy 31 | 31.56' | $ 92,234 | 43 | 13 |
| Finngulf 31You are here | — | $ 13,900 | 1 | 0 |