Positioned between the 68 and 88 models, the Sirena 78 combines naval architecture by Frers Naval Architecture & Engineering with interior decor options by Cor D. Rover Design Studio. Built by Sirena Marine using GRP and carbon hybrid fiber construction, the vessel offers flexible space planning with no lower helm station on the main deck, allowing for an open kitchen/galley, freestanding dining table, and expansive saloon. Accommodation features a 4 en-suite guest cabin layout for 8 guests plus 2 crew members, along with versatile flybridge options and multiple curated interior decor packs.
| Interior Decor Packs: | Inspiration (light, airy tones), Serenity (warm wood, soft finishes, cognac leather), Elegance (high-contrast dark wood, anthracite lacquer, white leather) |
| Standard Engines: | 2 x MAN V12 (1,400 HP each) |
| Total Beds / Berths: | 8 Guests + 2 Crew |
| Exterior Styling & Concept: | Frers Naval Architecture & Engineering |
| Flybridge Configurations: | Open (hardtop), Semi-Enclosed (protected forward helm, open aft terrace), Fully Enclosed (climate-controlled sky lounge) |
| Main Deck Social Layout: | No lower helm station; fully dedicated open social kitchen/galley, freestanding dining table, and panoramic saloon |
| Owner's Master Stateroom: | Full-beam amidships master suite with king-size bed, private dressing area, sofa lounge, vanity desk, and large en-suite bath. |
| Transmission & Max Propeller: | V-Drive / 990 mm diameter |
| Foredeck (Bow Lounge): | Expansive sunpad island with twin forward-facing L-shaped lounges and dining tables |
| Length (LOA): | 25.02 m / 82' 1" |
| Displacement (Loaded - mLDC): | 76.2 tonnes (Open) / 78.5 tonnes (Semi) |
| Economy Speed & Consumption: | 10 kn (54 lt/hr Open / 58 lt/hr Semi) |
| Black Water Tank Capacity: | 800 lt / 211 US gal |
| Fresh Water Tank: | 1,800 lt / 476 US gal |
| Marine Gears & Reduction: | ZF 2000 V / ZF 2050 V (Ratio: 2.467:1) |
| Cruising Speed & Consumption: | 16 kn (220 lt/hr Open / 230 lt/hr Semi) |
| Gray Water Tank Capacity: | 800 lt / 211 US gal |
| Crew Cabins: | 2 Independent Crew Cabins (Stern) |
| Max Speed (1400 HP std): | 25.5 knots |
| Building Materials: | GRP / Carbon Hybrid Fiber |
| Cruising Range (@ 9 kn, 10% res.): | Approx. 1,500 NM (Open) / 1,400 NM (Semi) |
| Hull Beam (BH ISO 8666): | 6.52 m / 21' 4" |
| Guest Cabins: | 4 En-suite Cabins (2 Doubles + 2 Twins) |
| Waterline Length (LWL @ full load): | 21.51 m / 70' 7" |
| VIP Forward Stateroom: | Bow stateroom with king-size berth, chaise lounge, private dressing table, panoramic hull glazing, and private luxury bathroom. |
| Beam / Width: | 6.52 m / 21' 4" |
| Builder / Shipyard: | Sirena Marine (Bursa / Türkiye) |
| Height Above Waterline (Ha): | 7.00 m (Open) / 6.96 m (Semi-Enclosed) |
| Displacement (Light Craft - MLCC): | 65.5 tonnes (Open) / 67.7 tonnes (Semi) |
| Height / Depth: | 7.00 m (Open) / 6.96 m (Semi-Enclosed) |
| Length Overall (LOA): | 25.02 m / 82' 1" |
| Twin Guest Cabins: | Two independent port and starboard twin cabins, each with two parallel single berths and private en-suite bathrooms. |
| Bathrooms / Heads: | 4 En-suite + 1 Crew Head |
| Crew Quarters: | Aft transom quarters with 2 separate berths, private crew bathroom, mess area, and direct deck/engine room access. |
| Hull Type: | Semi-Displacement |
| Interior Decor Studio: | Cor D. Rover Design Studio (Netherlands) |
| Design Draft: | 1.68 m (Open) / 1.72 m (Semi-Enclosed) |
| Max Speed (1550 HP opt): | 27.0 knots |
| Optional Engines: | 2 x MAN V12 (1,550 HP each) |
| Aft Cockpit & Platform: | Spacious alfresco dining, stair access to flybridge, and large hydraulic swim platform for tender launching |
| Hull Length (LH ISO 8666): | 22.10 m / 72' 6" (Net GRP) |
| Hull Design & Naval Architecture: | Frers Naval Architecture & Engineering |
| Diesel Tank Capacity: | 9,000 lt / 2,378 US gal |
| Max Draft (TMax @ full load): | 1.68 m (Open) / 1.72 m (Semi-Enclosed) |
| Service Speed / RPM: | 25.5 knots |