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Withdrawn from Sunreef's published range — the historic specification, kept for reference.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.
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. 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.
The published drafts are the ones to build a decision on: 0.9 m on the 55, 1.2 m on the 66. On the 77 and the 88, get draft and tankage in writing before you sign anything — Sunreef will give you the numbers if you ask, and they belong in the contract alongside the general arrangement.
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?
It varies by model. The ULTIMA 55 is the fullest: length, beam, draft, both tank capacities and a completely specified hybrid drivetrain including battery capacity. The 66 adds guest and crew counts alongside 1.2 m of draft. On the 77 and the 88, request tankage and draft in writing before contract — they belong in the specification alongside the general arrangement.
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