The Tristram 821 Offshore

Three state-of-the art transom options to suit your offshore adventures.

Tristram 821 Offshore Twin Outboard

NEW Tristram 821 Offshore Single Outboard

Tristram 821 Offshore Diesel Sterndrive

Link to: Tristram 821 Offshore Twin Outboard

Twin Outboards

Link to: NEW Tristram 821 Offshore Single Outboard

NEW Single Outboard

Link to: Tristram 821 Offshore Diesel Sterndrive

Diesel Sterndrive

Dimensions & Capacities

821 Offshore821 Offshore821 Offshore
Twin OutboardSingle OutboardSterndrive
L.O.A.
(length to ISO8666*)		8.77m
28’9″		8.77m
28’9″		8.77m
28’9″
Beam2.78m
9’1″		2.78m
9’1″		2.78m
9’1″
Fuel Capacity400L400L400L
Water Capacity100L100L100L
Internal headroom (floor to hardtop ceiling)1.950m
6′ 4″		1.950m
6′ 4″		1.950m
6′ 4″
Length
(Boat, Engine & Trailer)		9.56m
31’4″		9.56m
31’4″		9.56m
31’4″
Beam
(Boat & Trailer)		2.78m
9’1″		2.78m
9’1″		2.78m
9’1″
Height3.065m
10’1″		3.065m
10’1″		3.065m
10’1″
Height
(to top of optional rocket launcher)		3.33m
10’11”		3.33m
10’11”		3.33m
10’11”
Height
(to top of optional radar)		3.365m
11’1″		3.365m
11’1″		3.365
11’1″
Weight
(incl PD fuel)		3,500kg
7,716lb		3,500kg
7,716lb		3,500kg
7,716lb
  • L.O.A.
    8.77m / 28’9"
    Boat Only (length to ISO8666*)
  • Beam
    2.78m / 9’1"
    Boat Only
  • Fuel Capacity
    400L
  • Internal headroom
    1.95m / 6’4"
    Floor to hardtop ceiling
  • LENGTH
    9.56m / 31’4"
    Boat, Engine & Trailer
  • BEAM
    2.78m / 9’1"
    Boat & Trailer
  • Height
    3.065m / 10’1"
    On Trailer
  • Height
    3.33m / 10’11"
    On Trailer
    (to top of optional rocket launcher)
  • Height
    3.365m / 11’1"
    On Trailer
    (to top of optional radar)
  • Weight
    3,500kg / 7,716lb
    On Trailer
    (incl PD fuel)

* Length of the hull (Lh) to ISO8666: Includes all moulded structural and integral parts. / ** Dimensions and Capacities are approximate and variable.

Fuel Efficiency Comparisons

Click Here to Discover More

Link to: ‘Power Option Shootout’ – Pacific Powerboat Magazine

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Let Team Tristram take you on your next adventure

Please complete an enquiry online or call our team today.

+64-7-849-5225

Showroom Hours
Mon-Fri / 8:30am – 5:00pm
(Bookings recommended)

5 Udy Place
Te Rapa Park
Hamilton 3200
New Zealand

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  • – Summer Hours –

    Tristram Marine is closing on Friday 19th December 2025.

    Urgent on-water assistance will be available via +64-7-849-5225 during the break.

    Service technicians will be onsite from Monday 12th January 2026.

    Our Showroom is scheduled to resume normal opening hours from Monday 19th January 2026.

    Our team wish you, your family, and your friends an amazing summer on the water!

The World of Tristram

Click here for more information on Australasia’s leading GRP trailer boat manufacturer.

Contact Our Team

Please call +64-7-849-5225 or click here to complete an online enquiry.

Showroom, Service & Production

Mon – Fri
8am – 5pm
+64-7-849-5225

5 Udy Place
Te Rapa Park
Hamilton 3200
New Zealand