1970 Irwin 34 vs Catalina 425 — Comparison
Catalina 425
Specifications Side by Side
| Specification | 1970 Irwin 34 | Catalina 425 |
|---|---|---|
| General | ||
| Manufacturer | Irwin | Catalina |
| Year | 1970–1978 | 2013 |
| Type | Sloop | Sloop |
| Country | USA | USA |
| Designer | Ted Irwin | Gerry Douglas |
| Dimensions | ||
| LOA | 10.36 m (34.0 ft) | 12.95 m (42.5 ft) |
| LWL | 8.23 m (27.0 ft) | 11.28 m (37.0 ft) |
| Beam | 3.20 m (10.5 ft) | 3.96 m (13.0 ft) |
| Draft | 1.52 m (5.0 ft) | 2.06 m (6.8 ft) |
| Weight | ||
| Displacement | 5,443 kg (12,000 lbs) | 9,616 kg (21,200 lbs) |
| Ballast | 2,177 kg (4,799 lbs) | 3,719 kg (8,199 lbs) |
| Sailing | ||
| Sail Area | 47.9 m² (516 ft²) | 78.0 m² (840 ft²) |
| Hull Material | Fiberglass | Fiberglass |
| Keel Type | Full | Fin |
| Engine & Tanks | ||
| Engine | 18 HP | 55 HP |
| Fuel Capacity | 76 L (20.1 gal) | 152 L (40.2 gal) |
| Water Capacity | 114 L (30.1 gal) | 322 L (85.1 gal) |
| Accommodation | ||
| Berths | 6 | 7 |
| Cabins | 2 | 2 |
Performance Comparison
Detailed Comparison
The 1970 Irwin 34 and Catalina 425 represent two takes on sloop-rigged sailing. The 1970 Irwin 34 is a 1970s design by Irwin from USA, while the Catalina 425 is a modern offering from Catalina from USA. The 1970 Irwin 34 was penned by Ted Irwin. The Catalina 425 was designed by Gerry Douglas.
In terms of size, the 1970 Irwin 34 measures 10.36m (34.0ft) overall with a beam of 3.20m, compared to the Catalina 425 at 12.95m (42.5ft) with a 3.96m beam. The Catalina 425 is 2.59m longer than the 1970 Irwin 34. The Catalina 425 displaces approximately 77% 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 Catalina 425, with an SA/D of 17.52 and 78.0 m² of canvas, offers good sail power for versatile performance. The Catalina 425 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 Catalina 425 has a comfort ratio of 17.0 and a capsize screening value of 0.75. The ballast ratios are 40.0% for the 1970 Irwin 34 and 38.7% for the Catalina 425, 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 Catalina 425 offers 7 berths in 2 cabins with 322L water and 152L 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 Catalina 425 has the performance advantage with its superior SA/D ratio, meaning more sail power relative to its displacement for competitive sailing.
For liveaboard: The Catalina 425 offers more sleeping accommodation, making it better suited for extended living aboard. Consider water and fuel capacity for extended stays away from marinas.
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Or view individual specs: 1970 Irwin 34 · Catalina 425