The Sunreef 77 ULTIMA: When Speed Meets Space
Length, beam, guest count and an engine package. That is close to the entire published specification on a seventy-seven-foot yacht — get the…
Read the articleSunreef ULTIMA 77
Expert Review, Technical Specifications & Market Analysis
The Essentials
| Feature | Specifications |
|---|---|
| Overall Length | 23.5 m (77 ft) |
| Beam | 8.2 m (27 ft) |
| Engines | Volvo Penta D11 IPS 950 (classic version) |
| Cabins / Heads | Up to 10 guests |
Source: Spec & Photos courtesy of Sunreef. Specs verified by Tony Smith, USCG 100 Ton Master, on August 11, 2026.
You want ten guests aboard a performance catamaran narrow enough to berth anywhere, with a hydrofoil option on the order form. The ULTIMA 77 is the range's least documented and most interesting boat.
Part of the Sunreef ULTIMA series — see how owners step up through the lineup.
Quick Verdict
- Up to 10 guests on a 23.5 m hull with an 8.2 m beam — nearly four metres narrower than the 80 Sunreef Power, which is the difference between a specialist berth and an ordinary one
- Volvo Penta D11 with IPS 950 pods, the largest package in the range below the 88, with a hydrofoil option offered
- The thinnest specification block of the fourteen: no fuel, no water and no draft are published, so get all three in writing before contract
Our Take
The 77 is the boat in this range I most want to see in person and the one Sunreef tells you least about. Length, beam, guest count and the engine package — that is the entire published specification. No fuel, no water, no draft. On a 77-foot yacht that is a thin sheet.
What is there is promising. Eight point two metres of beam on twenty-three and a half metres of hull is a genuinely sleek proportion for a catamaran, the IPS 950 package is a lot of pod drive, and the hydrofoil option is offered here as it is on the 66.
I would not sign anything on this boat without a written specification covering tankage and draft. Sunreef will provide it — the yard simply has not published it. That is a documentation problem, not an engineering one, but it is your problem until you ask.
Sunreef ULTIMA 77 Photo Gallery
Photos courtesy of Sunreef.
Sunreef ULTIMA 77 Overview
The Sunreef ULTIMA 77 sits between the 66 and the 88 in the yard's narrow-beam performance range. Sunreef publishes 23.5 m (77 ft) overall on an 8.2 m (27 ft) beam and accommodation for up to 10 guests.
That is close to the whole published specification. No fuel capacity, no water capacity and no draft are given for this model — the thinnest specification block of the fourteen models we cover.
The classic drivetrain is Volvo Penta D11 with IPS 950 pods. As on the 66, Sunreef offers a hydrofoil option and high-performance hybrid propulsion, with ultralight flexible solar panels across the range.
Performance & Handling
Sunreef publishes no speed or cruise figure for the ULTIMA 77, so those rows are empty.
The classic version runs Volvo Penta D11 engines with IPS 950 pod drives — the largest pod package in the ULTIMA range below the 88. A hydrofoil option and hybrid propulsion are offered but not specified with output figures.
No draft is published for the 77. Given that shallow draft is the defining characteristic of the range, this is the figure to request in writing before you commit.
Interior & Accommodations
Ten guests inside 8.2 m of beam, on a 23.5 m hull. As with the rest of the ULTIMA range, the proportions favour length over width, which is what preserves marina access.
Standard range equipment includes folding bulwark platforms that extend the aft deck at anchor, custom sea-stairs, and stowage designed for water toys.
Sunreef publishes a guest count but no cabin or head breakdown, and no living-space figure. Every ULTIMA is built to order.
Market Position
The ULTIMA 77 competes against fast 75-to-80-foot monohulls on berth footprint while offering the stability and deck area of a catamaran. Its closest in-house rival is the 80 Sunreef Power, which is nearly four metres wider and a very different boat to berth.
The hydrofoil option is rare in this segment and at this size.
Sunreef's own documentation for the model is unusually thin, which puts more weight on the shipyard visit and the written specification than it would on a better-documented boat.
Who the ULTIMA 77 Is For
Buy the ULTIMA 77 if you want ten guests on a performance catamaran that will take an ordinary berth, and you are prepared to get the missing specification from the yard directly rather than off a web page.
Step up to the ULTIMA 88 for more length, a bigger pod package and a published living-space figure. Step down to the 66 if you want the model with the fullest published specification in the range. Step across to the 80 Sunreef Power if full-beam volume matters more than marina access.
Sunreef ULTIMA 77 Articles & Guides
Compare With
Frequently Asked Questions
How does the ULTIMA 77 compare with the 80 Sunreef Power?
They are close in length — 23.5 m against 23.8 m — but very different boats. The 80 Sunreef Power is 12.00 m wide with a full-beam cockpit and a published 1.7 m draft; the ULTIMA 77 is 8.2 m wide, nearly four metres narrower, which is the difference between needing a specialist berth and taking an ordinary one. Choose on marina access versus deck area.
What specifications does Sunreef publish for the ULTIMA 77?
Very few: 23.5 m (77 ft) overall, an 8.2 m (27 ft) beam, accommodation for up to 10 guests, and a classic drivetrain of Volvo Penta D11 with IPS 950 pods. No fuel capacity, no water capacity and no draft are published for the model — the thinnest specification block of the fourteen we cover. Request those figures from the yard before you commit.