March 5, 2026
The Sunreef 55 ULTIMA: When Speed Meets Silence on the Water
Narrower than many monohulls its length and drawing under a metre. The ULTIMA range exists to solve the one real problem with owning a catam…
Read the articleThe Sunreef ULTIMA Series
Narrow-beam performance catamarans that berth like monohulls
The real objection to owning a catamaran is the beam. A 60-foot Sunreef Power is 10.7 m wide and your marina options collapse. The ULTIMA range answers that directly: the 55 is 5.6 m across, narrower than plenty of monohulls its length, and still draws only 0.9 m.
Four boats in the published range, from 16.6 m to 28.40 m, with Volvo Penta IPS pod drives, hydrofoil options on the larger hulls, and ultralight flexible solar panels across the range.
Sunreef files the ULTIMA range under Power Yachts. One caution that matters: the model numbers are not lengths in feet. The ULTIMA 66 measures 22 m and the 88 measures 28.4 m — check the dimension against your berth, not the name.
The ULTIMA Lineup, Smallest to Largest
Every Sunreef ULTIMA model we review in depth, in the order owners step up through the series.
Photo credit Sunreef.
0.9 m draft, 5.6 m beam and a 220 kWh hybrid bank — a catamaran that berths like a monohull.
8 guests, 3 crew, 1.2 m draft — and narrow enough for a monohull berth.
Up to 10 guests, 8.2 m beam, Volvo Penta IPS 950 — with a hydrofoil option.
387 m² of living space inside 9.3 m of beam — the ULTIMA range's flagship.
Withdrawn from Sunreef's published range — recorded figures kept for reference.
Don't see the ULTIMA model you're after — or a brand-new launch? Request specs through Yacht Specs Direct.
Moving Up the ULTIMA Series
ULTIMA 5516.6 m (55 ft)ULTIMA 6622 m (72 ft 2 in)ULTIMA 7723.5 m (77 ft)ULTIMA 8828.40 m (93 ft 2 in)ULTIMA 11136.2 m (118 ft 11 in)
The ULTIMA 55 is the entry point and the shallowest boat Sunreef publishes anywhere: 0.9 m of draft on a 5.6 m beam, with a fully specified hybrid drivetrain — 2 × e-350 kW plus 2 × 600 hp and a 220 kWh battery bank.
The ULTIMA 66 is the first size with separate crew accommodation: 8 guests plus 3 crew, 1.2 m of draft, 4,000 l of fuel and Volvo Penta IPS 800.
The ULTIMA 77 carries up to 10 guests on an 8.2 m beam with IPS 950 pods and a hydrofoil option. It is also the least documented model Sunreef publishes.
The ULTIMA 88 is the flagship — 387 m² of living space inside 9.3 m of beam, which is a larger interior than Sunreef publishes for its 80-foot sailing catamaran, on a hull two metres narrower than the 80 Power.
Our Take
The ULTIMA is the most interesting idea in Sunreef's lineup and the one the shipyard documents worst. The concept is excellent: take the stability and the shallow draft that make a catamaran worth owning, give up the full-beam saloon, and end up with a boat that fits an ordinary berth. The 88 delivers 387 square metres of living space inside 9.3 metres of beam. That is more interior than the 80-foot sailing catamaran, in a slip you can actually book.
Then you look at the specification sheets. The 77 publishes length, beam, guest count and an engine package — and nothing else. No fuel, no water, no draft, on a seventy-seven-foot yacht. The 88 gives you fuel but no water and no draft. On a range whose entire premise is shallow draft, publishing that figure on only two of four models is a strange choice.
None of that is an engineering criticism. Sunreef will give you the numbers if you ask. But you do have to ask, and you should ask before you sign anything.
Sunreef ULTIMA Articles & Guides
Watch Our Sunreef ULTIMA Reviews
Official Sunreef Premieres
Videos courtesy of Sunreef.
Frequently Asked Questions
What makes the Sunreef ULTIMA range different from Sunreef's other catamarans?
Beam. A 60 Sunreef Power is 10.7 m wide, which rules out a great many marina berths. The ULTIMA range trades the full-beam saloon for a narrow hull that berths like a monohull while keeping catamaran stability and shallow draft — the ULTIMA 55 is just 5.6 m across and draws 0.9 m. The range runs 16.6 m to 28.40 m with Volvo Penta IPS pod drives and hydrofoil options on the larger hulls.
Does Sunreef publish full specifications for the ULTIMA range?
Not consistently. The ULTIMA 55 is well documented — length, beam, draft, both tank capacities and a fully specified hybrid drivetrain including battery capacity. The 77, by contrast, publishes only length, beam, guest count and an engine package: no fuel, no water and no draft on a 77-foot yacht. The 88 gives fuel and living space but no water and no draft. Request the missing figures in writing.
Is the Sunreef ULTIMA 66 sixty-six feet long?
No. The ULTIMA 66 measures 22 m overall, which is 72 ft 2 in. The ULTIMA model numbers are not lengths in feet the way the rest of Sunreef's range names are — the ULTIMA 88 is 28.40 m, or 93 ft 2 in. The 55 and 77 do happen to match their names at 16.6 m (55 ft) and 23.5 m (77 ft). Check the published dimension against your berth rather than the model number.
Which Sunreef ULTIMA has the most living space?
The ULTIMA 88, at 387 m². That is a larger interior than Sunreef publishes for its 80 Eco sailing catamaran, delivered on a hull 9.30 m wide — more than two metres narrower than the 80 Sunreef Power. It is the clearest single illustration of what the ULTIMA range is engineered to achieve: superyacht volume on a berth footprint you can actually book.
Which ULTIMA Fits Your Life?
Tell us how you plan to use the boat — guests, range, crew or no crew — and we'll give you the straight story on where in the ULTIMA series you belong, new or brokerage.
Explore All Sunreef ModelsOr reach Tony directly: TS@MintedYachts.com · +1 (404) 805-9819