FINNGULF 31
Specifications
Hull
| LOA | 31 ft |
| LWL | 25.26 ft |
| Beam | 9.81 ft |
| Draft | 5.41 ft |
| Displacement | 8,378 lb |
| Ballast | 3,967.8 lb |
| Hull speed1.34·√LWL | 6.7 kn |
Rig & Sails
| Iforetriangle height | 38.71 ft |
| Jforetriangle base | 11.65 ft |
| Pmainsail luff | 41.01 ft |
| Emainsail foot | 13.94 ft |
| FLforestay | 11.7 ft |
| Mainsail | 534.2 sq ft |
| Jib (100%) | 225.5 sq ft |
| Spinnaker | 383.3 sq ft |
About the FINNGULF 31
Also known as INFERNO 31. Similar to CROWN 31. Rig dimensions from sailplan.
The Finngulf 31 is a fractional sloop designed by Håkan Södergren and built by Finngulf in Finland, with production records indicating a build year of 1982. As the specific hull count is not definitively established in the authoritative data, the model represents a niche entry from this specific vintage.
- Best for:
- This vessel is best suited for coastal cruising and protected waters, given its moderate displacement of 8378.0 lb and comfort ratio of 22.92, which suggest a balance between performance and seakeeping.
- Bluewater capability:
- With a capsize ratio of 1.94 and a displacement/length ratio of 232.06, the Finngulf 31 exhibits moderate offshore capability, though its fin keel and relatively light displacement suggest it is more optimized for coastal passage-making than heavy bluewater voyaging.
- Comparables:
- Comparable boats from the early 1980s with similar fractional sloop rigs and displacement ranges include the Beneteau First 303 and the Oyster 31, which share similar beam and draft characteristics.
Performance
ORC Performance Data(4 certificates)
Measured performance data from ORC (Offshore Racing Congress) certificates.
Polar Diagram
Boat speed (kn) vs. true wind angle. Source: ORC
Racing Ratings
Triple Number
ORC Measured
Sail Areas (ORC)
Speed Table (kn)
| TWA \ TWS | 6 | 8 | 10 | 12 | 14 | 16 | 20 |
|---|---|---|---|---|---|---|---|
| 52° | 4.9 | 5.7 | 6.2 | 6.4 | 6.5 | 6.5 | 6.5 |
| 60° | 5.2 | 6.0 | 6.4 | 6.6 | 6.7 | 6.7 | 6.7 |
| 75° | 5.4 | 6.1 | 6.5 | 6.7 | 6.9 | 7.0 | 7.1 |
| 90° | 5.3 | 6.2 | 6.6 | 6.8 | 7.0 | 7.2 | 7.5 |
| 110° | 5.3 | 6.3 | 6.7 | 7.0 | 7.3 | 7.5 | 7.8 |
| 120° | 5.1 | 6.1 | 6.6 | 6.9 | 7.2 | 7.6 | 8.1 |
| 135° | 4.6 | 5.6 | 6.3 | 6.7 | 7.0 | 7.3 | 8.0 |
| 150° | 3.9 | 4.9 | 5.7 | 6.4 | 6.7 | 7.0 | 7.6 |
| Beat VMG | 3.2 | 3.8 | 4.3 | 4.5 | 4.6 | 4.6 | 4.6 |
| Run VMG | 3.4 | 4.3 | 5.0 | 5.7 | 6.3 | 6.6 | 7.2 |
Pricing
We don't have market pricing data for the FINNGULF 31 yet. If you own one, help other buyers — what did you pay for it? Reports build a community price estimate over time.
Estimated Cost of Ownership
Based on 31ft LOA. Actual costs vary by condition, usage, and local rates.
Known Issues & Pre-Purchase Inspection
We don't have enough data on the FINNGULF 31yet to publish model-specific findings we'd stand behind — but here's a free general inspection checklist, built from our research into what actually goes wrong on boats of this kind.
Drawn from 7,029 documented issues across 2,391 models, ordered so the areas that most often turn up problems come first.
Own a FINNGULF 31? Reports from owners are what turn this into a model-specific checklist — and they're the reason the boats above it have one.
Similar Sailboats
Which engine powers your FINNGULF 31?
We haven't confirmed the engine for this model yet. If you own or know one, tell us — as owners report in, we build an accurate picture over time.
Already know your engine? Search all engines → to find its exact parts.
Used sails that fit the FINNGULF 31
Checking eBay for sails sized to this boat's rig…