Dehler Optima 83 Information, Review, Specs

Sailing Performance & Handling

The Optima 83 is characterized by a moderate-to-heavy displacement and a high ballast ratio, a hallmark of Van de Stadt designs from this period. With a fin keel and a skeg-hung rudder, the boat offers a level of directional stability that is often missing in modern, light-displacement flat-bottomed yachts. This design choice makes the Optima 83 particularly "sea-kindly," meaning it resists the urge to hobby-horse in a chop and tracks well when sailing close-hauled.

While it lacks the explosive acceleration of modern carbon-reinforced Dehlers, the Optima 83 is remarkably stiff. In heavier conditions, it remains upright and controllable long after lighter boats of similar length have been forced to reef. Editorial retrospectives in German nautical outlets like Yacht have frequently noted that the hull's narrow beam (by modern standards) allows it to slice through waves rather than pounding over them. The rig is typically a masthead sloop, providing a generous sail area that allows the boat to perform adequately in light winds, though it truly finds its rhythm in a Force 4 or 5 breeze.

Interior Comfort & Variations

For a boat with a length of approximately 8.3 meters, the interior of the Optima 83 was considered revolutionary at its launch. The layout follows a classic continental arrangement: a V-berth forward, a central salon with opposing settees that double as sea berths, and a compact galley and navigation station flanking the companionway. The use of molded GRP interior liners—a technique Dehler mastered early on—provided structural rigidity while making the interior easy to clean and maintain.

The Optima 83 was built on the same core hull lines that would eventually be refined into the Optima 85 (sometimes referred to as the Optima 850). The primary difference between these siblings lies in the cockpit and stern arrangements; later variants often featured a more integrated bathing platform or revised deck moldings. There was also a "Delanta" series built around this time that shared some design DNA but focused more on innovative cockpit layouts, such as the central steering position found in the Delanta 80. Inside the 83, the headroom is surprising for its era, though taller sailors may find the forward cabin and head compartment somewhat tight.

Known Issues & Buyer’s Checklist

Prospective buyers of an Optima 83 must account for the boat’s age, as many units are now over 50 years old.

1. GRP Osmosis: Early GRP hulls from the late 60s and early 70s were often overbuilt (thick laminates) but used resins that are susceptible to osmotic blistering. A professional moisture meter test is essential.
2. Engine Reliability: Many original Optima 83s were fitted with Farymann or Bukh diesel engines. While robust, parts for the oldest Farymann models are becoming increasingly difficult to source. Many well-maintained units have been repowered with Yanmar or Volvo Penta units.
3. Deck Core: Check for "soft spots" on the deck, particularly around stanchion bases and the mast step. Water ingress into the balsa or foam core can lead to delamination, a common issue for European production boats of this vintage.
4. Rigging and Chainplates: The stainless steel chainplates are often original. Due to the risk of crevice corrosion where the plates pass through the deck, these should be inspected or replaced if no service history is available.
5. Window Seals: The aluminum-framed windows of this era are prone to leaking. If the interior wood shows dark staining below the ports, the seals likely require replacement.

Community & Resources

Owners of the Optima 83 benefit from the extensive network of Dehler enthusiasts across Europe. The Dehler Club eV (Germany) is the most prominent technical resource, offering historical documentation and owner meets. While much of their documentation is in German, it remains the definitive source for technical drawings and original specifications for the Optima series.

The Verdict

The Dehler Optima 83 is a "youngtimer" classic that offers a robust entry point into coastal cruising. It is a boat built during an era when Dehler was proving the longevity of fiberglass, resulting in a hull that is often sturdier than its modern counterparts.

Pros:

• Exceptional sea-keeping and stability in heavy weather.
• High-quality German engineering and Van de Stadt design pedigree.
• Strong owner community and historical significance.
• Predictable, forgiving handling characteristics for solo sailors.

Cons:

• Limited interior volume and beam compared to modern 27-footers.
• Original engines and plumbing systems likely require modernization.
• Susceptibility to osmosis in older, untreated hulls.