1970 Irwin 34 vs Dufour 382 Grand Large — Comparison
Specifications Side by Side
| Specification | 1970 Irwin 34 | Dufour 382 Grand Large |
|---|---|---|
| General | ||
| Manufacturer | Irwin | Dufour |
| Year | 1970–1978 | 2014–2018 |
| Type | Sloop | Sloop |
| Country | USA | France |
| Designer | Ted Irwin | Felci Yacht Design |
| Dimensions | ||
| LOA | 10.36 m (34.0 ft) | 11.55 m (37.9 ft) |
| LWL | 8.23 m (27.0 ft) | 10.25 m (33.6 ft) |
| Beam | 3.20 m (10.5 ft) | 3.72 m (12.2 ft) |
| Draft | 1.52 m (5.0 ft) | 1.95 m (6.4 ft) |
| Weight | ||
| Displacement | 5,443 kg (12,000 lbs) | 7,200 kg (15,873 lbs) |
| Ballast | 2,177 kg (4,799 lbs) | 2,200 kg (4,850 lbs) |
| Sailing | ||
| Sail Area | 47.9 m² (516 ft²) | 63.0 m² (678 ft²) |
| Hull Material | Fiberglass | Fiberglass |
| Keel Type | Full | Fin |
| Engine & Tanks | ||
| Engine | 18 HP | 29 HP |
| Fuel Capacity | 76 L (20.1 gal) | 140 L (37.0 gal) |
| Water Capacity | 114 L (30.1 gal) | 260 L (68.7 gal) |
| Accommodation | ||
| Berths | 6 | 6 |
| Cabins | 2 | 2 |
Performance Comparison
Detailed Comparison
The 1970 Irwin 34 and Dufour 382 Grand Large represent two takes on sloop-rigged sailing. The 1970 Irwin 34 is a 1970s design by Irwin from USA, while the Dufour 382 Grand Large is a modern offering from Dufour from France. The 1970 Irwin 34 was penned by Ted Irwin. The Dufour 382 Grand Large was designed by Felci Yacht Design.
In terms of size, the 1970 Irwin 34 measures 10.36m (34.0ft) overall with a beam of 3.20m, compared to the Dufour 382 Grand Large at 11.55m (37.9ft) with a 3.72m beam. The Dufour 382 Grand Large is 1.19m longer than the 1970 Irwin 34. The Dufour 382 Grand Large displaces approximately 32% more than its counterpart, which significantly affects how each boat handles in different sea states.
Looking at performance, the 1970 Irwin 34 has moderate sail power suitable for relaxed cruising with an SA/D ratio of 15.73 and 47.9 m² of sail area. The Dufour 382 Grand Large, with an SA/D of 17.17 and 63.0 m² of canvas, offers good sail power for versatile performance. The Dufour 382 Grand Large has the edge in terms of raw sailing performance.
For comfort and safety, the 1970 Irwin 34 offers a moderate motion comfort level (comfort ratio: 22.6) and excellent capsize resistance suitable for offshore voyaging (capsize ratio: 0.73). The Dufour 382 Grand Large has a comfort ratio of 17.0 and a capsize screening value of 0.77. The ballast ratios are 40.0% for the 1970 Irwin 34 and 30.6% for the Dufour 382 Grand Large, reflecting their respective approaches to stability.
Below deck, the 1970 Irwin 34 provides 6 berths in 2 cabins with 114L of water capacity and 76L of fuel. The Dufour 382 Grand Large offers 6 berths in 2 cabins with 260L water and 140L fuel capacity.
Verdict
For cruising: The 1970 Irwin 34 is the better choice for comfortable cruising thanks to its higher comfort ratio, offering a gentler motion at sea that crews will appreciate on longer passages.
For racing: The Dufour 382 Grand Large has the performance advantage with its superior SA/D ratio, meaning more sail power relative to its displacement for competitive sailing.
For liveaboard: Both boats provide similar accommodation, making either a viable choice for living aboard. Consider water and fuel capacity for extended stays away from marinas.
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Or view individual specs: 1970 Irwin 34 · Dufour 382 Grand Large