INFERNO 31
Specifications
Hull
| LOA | 31 ft |
| LWL | 25.6 ft |
| Beam | 9.84 ft |
| Draft | 5.25 ft |
| Displacement | 9,479 lb |
| Ballast | 2,203.9 lb |
| Hull speed1.34·√LWL | 6.8 kn |
Rig & Sails
| Iforetriangle height | 38.68 ft |
| Jforetriangle base | 11.75 ft |
| Pmainsail luff | 41.01 ft |
| Emainsail foot | 13.91 ft |
| FLforestay | 11.8 ft |
| Mainsail | 535.3 sq ft |
| Jib (100%) | 227.3 sq ft |
| Spinnaker | 386.3 sq ft |
About the INFERNO 31
Similar to the CROWN 31 and FINNFULF 31. See FINNGULF 31 for more details.
The Inferno 31 is a fractional sloop designed by Håkan Södergren and built by Finngulf (FIN) in 1983. With a displacement of 9479.0 lb and a comfort ratio of 25.6, this vessel offers a balanced blend of performance and stability for its era.
- Best for:
- This boat suits coastal cruisers and weekend sailors who prioritize a manageable 31.0 ft LOA with a fractional rig for easier single-handed handling. Its moderate displacement and fin keel configuration make it well-suited for active day sailing and short offshore passages.
- Bluewater capability:
- With a capsize ratio of 1.86 and a displacement of 9479.0 lb, the Inferno 31 is designed primarily for coastal cruising rather than heavy bluewater passagemaking. Its fin keel and relatively light ballast ratio suggest it is best suited for protected waters and short offshore trips rather than extended ocean crossings.
- Comparables:
- Comparable boats from the same era include the Beneteau First 30 and the O'Day 302, which share similar fractional sloop rigs and target the performance-oriented coastal cruising market. These vessels offer similar beam and draft characteristics, providing a direct comparison for buyers seeking a 30-foot performance cruiser.
Performance
ORC Performance Data(7 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 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 20 | 24 |
|---|---|---|---|---|---|---|---|---|---|
| 52° | 3.7 | 4.9 | 5.7 | 6.1 | 6.3 | 6.4 | 6.5 | 6.5 | 6.5 |
| 60° | 4.0 | 5.3 | 6.0 | 6.3 | 6.5 | 6.6 | 6.7 | 6.7 | 6.7 |
| 75° | 4.3 | 5.6 | 6.3 | 6.6 | 6.8 | 6.8 | 6.9 | 7.0 | 7.1 |
| 90° | 4.4 | 5.6 | 6.3 | 6.7 | 6.9 | 7.1 | 7.2 | 7.4 | 7.5 |
| 110° | 4.0 | 5.3 | 6.2 | 6.6 | 6.9 | 7.2 | 7.4 | 7.9 | 8.2 |
| 120° | 3.7 | 5.0 | 6.0 | 6.5 | 6.9 | 7.2 | 7.4 | 8.0 | 8.6 |
| 135° | 3.3 | 4.5 | 5.5 | 6.3 | 6.7 | 7.0 | 7.3 | 8.0 | 8.8 |
| 150° | 2.7 | 3.9 | 4.9 | 5.8 | 6.3 | 6.7 | 7.0 | 7.6 | 8.4 |
| Beat VMG | 2.3 | 3.1 | 3.8 | 4.2 | 4.4 | 4.5 | 4.5 | 4.5 | 4.5 |
| Run VMG | 2.3 | 3.3 | 4.3 | 5.0 | 5.7 | 6.2 | 6.6 | 7.2 | 7.7 |
Pricing
We don't have market pricing data for the INFERNO 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 INFERNO 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 INFERNO 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 INFERNO 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 INFERNO 31
Checking eBay for sails sized to this boat's rig…