Sunreef Ultima 55Sunreef Ultima 55
Invictus ST550 Invictus ST550
VS

Sunreef Ultima 55
vs.
Invictus ST550

By YachtBuyer
YachtBuyer is the only place where you can directly compare competing yacht models, with full breakdowns on technical specifications and onboard features.

So with YachtBuyer you can not only enjoy the best data and market activity on your chosen yachts but also how they compare to their closest rivals.

Below, we delve into a detailed comparison of the Sunreef Ultima 55 and the Invictus ST550 . The Sunreef Yachts Ultima 55 features a , ensuring durability and a lighter weight. The yacht's length of 16.6m/54'6" and beam of 5.6m/18'4" provide a stable and spacious platform for both at-sea and anchored conditions. The Invictus ST550 offers a very similar length of 16.87m/55'4", with a marginally wider beam of 5.04m/16'6",

Interested in owning a Sunreef Yachts Ultima 55 or Invictus ST550? Explore all globally available Sunreef Yachts Ultima 55 for sale and Invictus ST550 for sale verified through YachtBuyer MarketWatch, free of fake listings, or check out all similar models from Sunreef Yachts for sale or Invictus for sale.

At a Glance

Sunreef Ultima 55

Status
In Production
2025 - Present

Invictus ST550

Status
In Production
2025 - Present
Sunreef Ultima 55 illustration
54' 6"  

Beam 18' 4"

Draft 2' 11"

LENGTH : BEAM Ratio

0.00
:
1

8 Guests

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8

6 Guests or 8 is Optional  

3 Cabins Optional 4 Cabin Layout

2 Crew

Invictus ST550 illustration
55' 4"  

Beam 16' 6"

Draft -

LENGTH : BEAM Ratio

0.00
:
1

6 Guests

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6

4 Guests or 6 is Optional  

2 Cabins Optional 3 Cabin Layout  

1 Crew

Performance

  • Cruising Speed

  • Sunreef Ultima 55
    0
    knots
  • Invictus ST550
    No Data

  • Top Speed

  • Sunreef Ultima 55
    0
    knots
  • Invictus ST550
    0
    knots

Range

Fuel Capacity

  • Sunreef Ultima 55

    -

  • Invictus ST550

    -

Interior

For most buyers, interior layout, finish and especially space will rank as some of the most important factors when choosing a yacht, here you can see how your chosen yachts directly compare.

Sunreef Ultima 55, Interior Sunreef Ultima 55, Interior
Sunreef Ultima 55
Invictus ST550 , Interior Invictus ST550 , Interior
Awaiting Supply

Accommodation

Cabin design and luxury should deliver a place of real sanctuary for the Owner or guests, with finish, space and light all key.

Sunreef Ultima 55, Accommodation Sunreef Ultima 55, Accommodation
Awaiting Supply
Invictus ST550 , Accommodation Invictus ST550 , Accommodation
Invictus ST550

Helm Station

Whether it will be the Owner or skipper taking control, helm positions should ensure excellent visibility, supportive seating and a design that delivers clear instrumentation.

Sunreef Ultima 55, Helm Station Sunreef Ultima 55, Helm Station
Awaiting Supply
Invictus ST550 , Helm Station Invictus ST550 , Helm Station
Invictus ST550

Deck Areas

As well as being a place to enjoy the real essence of yachting lifestyle, decks are also a serious work area and each area must be safe, practical and so fun to use.

Sunreef Ultima 55, Deck Area Sunreef Ultima 55, Deck Area
Sunreef Ultima 55
Invictus ST550 , Deck Area Invictus ST550 , Deck Area
Invictus ST550

Compare Layouts

Main Deck

Sunreef Ultima 55

Main Deck

 

Invictus ST550

Main Deck

Standard

Main Deck

Optional galley down Option

Lower Deck

Sunreef Ultima 55

Lower Deck

Standard

Lower Deck

Optional 4 cabin layout Option

Invictus ST550

Lower Deck

Standard

Lower Deck

Optional galley down Option  A

Lower Deck

Optional 3 cabin layout Option  B

LIVE: Used Price Guides

Find out how much a pre-owned version of these models may cost based upon the asking prices of all yachts listed for sale globally in the last 3 years according to YachtBuyer Market Watch & our current sales listings.

Sunreef Ultima 55 Used Prices

In Production Since: 2025

  • Average Price* -
  • Price Range † -
  • Average Age -

Available to order

View Options & Specs
Ultima 55 For Sale

or Build Your Own

 
 


Rivals to Sunreef Ultima 55

Invictus ST550 Used Prices

In Production Since: 2025

  • Average Price* -
  • Price Range † -
  • Average Age -

Available to order

View Options & Specs
ST550 For Sale

or Build Your Own

 
 

Specification Data

Model Name:Ultima 55ST550
Builder:Sunreef YachtsInvictus
Range:Sunreef Ultima RangeInvictus ST Series
Principal Characteristics
Body Type: Multihull, Catamaran Classic Style, Cruiser
Use Types: Cruising, Weekending Weekending, Cruising, Dayboating
LOA: 54' 6" 55' 4"
Max Beam: 18' 4" 16' 6"
Draft: 2' 11" -
Gross Tonnage: - -
Displacement: - 55,116 Lbs  
(Approx)
Hull Material: Composite GRP / Fibreglass  (Fibreglass)
Superstructure: Composite Fibreglass
Fuel Capacity: 396 Gallons 581 Gallons
Fresh Water Capacity: 79 Gallons 132 Gallons
Black Water capacity: - 87 Gallons
Yacht Designers
Exterior Designer: Sunreef Yachts Christian Grande
Interior Designer: Sunreef Yachts Christian Grande
Accommodation
Guests: 6 (Optional 8) 4 (Optional 6)
Cabins: 3 - 4 2 - 3
Berths:2x Double1x Bunk Bed1x Double1x Convertable
Guests Heads: 3 2
Shared Day Heads: 0 -
Crew
Crew:2 1 to 1
Crew Cabins: 1 1
Crew Heads: 1 1
Engines & Performance
Max Speed:36 knots35 knots
Max Range: 240 NM @ 20 knots -
Engine Options:

Compare Engine Options

Compare Engine Options

Brand: Volvo Penta Volvo Penta Volvo Penta Volvo Penta
Model:D8-IPS800D6-IPS650D11-IPS800D11-IPS950
Qty: x2 x2 x2 x2
Power: 600 bhp (441 Kw) each
@ 3,000 rpm 480 bhp (353 Kw) each
@ 3,700 rpm		 625 bhp (459 Kw) each
@ 2,400 rpm 725 bhp (533 Kw) each
@ 2,500 rpm
Max Speed: 36 knots 35 knots - 35 knots
Cruising Speed: 20 knots   25 knots   - -
Economic Speed: - - - -
Cylinders: 6 Cylinder 6 Cylinder 6 Cylinder 6 Cylinder

Speeds/Ranges Are Approx. - Subject to Load, Sea Conditions & Variables.

Interested?

Find out more about the...

Ultima 55 For Sale ST550 For Sale

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WRITTEN BY

Editorial Team

WRITTEN BY

Editorial Team

The editorial team at YachtBuyer consists of yacht specialists, seasoned professionals, renowned journalists, and individuals with a profound passion for the world of yachting.

'NOTE: The information contained in this website is for general information purposes only. The information is provided by YachtBuyer and while we endeavour to keep the information up to date and correct, we make no representations or warranties of any kind, express or implied, about the completeness, accuracy, reliability, suitability or availability with respect to the website or the information, products, services, or related graphics contained on the website for any purpose. Any reliance you place on such information is therefore strictly at your own risk.'

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