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Tiara 3800 Open
(w/ 2 x 450-hp Cummins 6CTA 8.3-M2 diesel inboards)


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Brief Summary

The Tiara 3800 Open is a rugged offshore fishing boat with the features and amenities of a family cruiser. She delivers high performance with top-of-the-line comforts.

Key Features

With 147 square feet in the cockpit there’s plenty of room when you hook into a big one or when you’re simply in the mood to entertain. An insole fishbox can easily hold the catch of the day, and it’s a great spot to stow the family’s beach toys too. A fishing console with sink and a waist-high circulating livewell are an option here, but the L-shaped galley comes fully equipped with AD/DC refrigeration, microwave oven, abundant storage space and Corian countertops. The master stateroom features a queen-sized pedestal bed, which makes it easy to get around and make up when you want to get on your way. And to take you there, twin 435-hp Cats or 450-hp Cummins provide plenty of get up and go. Contact: Tiara Yachts, 725 East 40th Street, Holland, MI 49423-5392 Phone: (616) 392-7163,


Length Overall 40' 9''
Beam 14' 2''
Dry Weight 22,500 lbs
Tested Weight N/A
Draft 3' 6''
- Draft Up N/A
- Draft Down N/A
- Air Draft N/A
Deadrise/Transom 18 degrees
Max Headroom 6'7
Bridge Clearance 9'5''
Weight Capacity N/A
Person Capacity N/A
Fuel Capacity 411 Gallons
Water Capacity 110 gal
Length on Trailer N/A
Height on Trailer N/A
Trailer Weight N/A
Total Weight
(Trailer, Boat, & Engine)

Prices, features, designs, and equipment are subject to change. Please see your local dealer or visit the builder's website for the latest information available on this boat model.

Engine Options

Std. Power 2x435-hp Caterpillar 3208DITA diesel inboards
Tested Power 2 x 450-hp Cummins 6CTA 8.3-M2 diesel inboards
Opt. Power 2x450-hp Cummins 6CTA 8.3-M2 diesel inboards

Test Results - Change Measurement Unit

RPM MPH Knots GPH MPG NMPG Stat. Mile NM dBa
600 7.0 6.0 2.6 2.7 2.3 989 860 73
1000 9.8 8.5 5.9 1.7 1.4 614 534 79
1250 11.1 9.7 10.5 1.1 0.9 391 340 87
1500 13.4 11.7 17.7 0.8 0.7 280 244 86
1750 19.7 17.1 23.1 0.9 0.7 315 274 83
2000 25.7 22.3 27.1 1.0 0.8 351 305 87
2250 30.2 26.2 30.8 1.0 0.9 362 315 88
2500 33.7 29.3 41.6 0.8 0.7 300 261 89
2650 35.4 30.7 49.0 0.7 0.6 267 232 90
600 860 1592 11.30 9.84 1.14 73
1000 534 988 15.80 22.33 0.71 79
1250 340 629 17.90 39.75 0.45 87
1500 244 451 21.60 67.00 0.32 86
1750 274 507 31.70 87.44 0.36 83
2000 305 565 41.40 102.58 0.40 87
2250 315 583 48.60 116.59 0.42 88
2500 261 483 54.20 157.47 0.34 89
2650 232 430 57.00 185.48 0.31 90

All fuel consumption numbers are the total for all engines in the boat. Speeds are measured with Stalker ProSports radar gun or GPS. Fuel consumption (gallons per hour) measured with Floscan digital fuel-flow meter or by on-board factory-installed diagnostic instruments. Range is based on 90% of published fuel capacity. Sound levels determined using Radio Shack digital decibel meter on A scale. 68 dBA is the level of normal conversation. Time to plane is measured from start of acceleration to formation of rooster tail behind boat.

Performance Chart

Performance Chart

Acceleration Times & Test Conditions

Time To Plane n/a
0 to 30 n/a
Ratio 1.71:1
Props 24x38 3-bld Nibral
Load -fuel, -water, 4 persons on board, min. cruising gear
Climate Temp: 84F, Humid: 74%, Wind: 5-10 knots, Seas: 1-2 feet

Tiara 3800 Open Line Drawing


Captain's Report

The designers of the Tiara 3800 have successfully combined performance that savvy skippers demand with top-of-the-line creature comforts.Tiara quality is a benchmark — hand-laid hulls and decks, 40/60 glass-to-resin ratios, and superior core materials pay off with a super-smooth, distortion-free finish. Engine access on this boat is very good, first, by way of a day hatch in the bridge deck, and then via the electric lift hatch. Easy access means easy maintenance.Meanwhile, the helm tilts back for easy access to the wiring, and controls are easy to reach. Plus, there’s plenty of room to mount your choice of cruising and fishing electronics.There’s not a bad seat in the house on the 3800. A double-wide, back-to-back helm seat w/stowage below is to starboard, and there’s a standard hideaway wet bar just behind it with optional icemaker.For more information call (616) 392-7163 or visit

Test Result Highlights

  • Top speed for the Tiara 3800 Open is 35.4 mph (57 kph), burning 49 gallons per hour (gph) or 185.46 liters per hour (lph).
  • Best cruise for the Tiara 3800 Open is 30.2 mph (48.6 kph), and the boat gets 0.98 miles per gallon (mpg) or 0.42 kilometers per liter (kpl), giving the boat a cruising range of 362 miles (582.58 kilometers).
  • Tested power is 2 x 450-hp Cummins 6CTA 8.3-M2 diesel inboards.

Standard and Optional Features


Air Cond./Heat Optional
Battery Charger/Converter Standard
CD Stereo Standard
Head: Fixed Standard
Shore Power Standard
Trim Tabs Standard
TV/DVD Optional
Washdown: Fresh Water Optional
Washdown: Raw Water Optional
Water Heater Standard
Windlass Optional


Coffeemaker Standard
Icemaker Optional
Microwave Standard
Refrigerator Standard
Stove Standard

Exterior Features

Carpet: Cockpit Optional
Outlet: 12-Volt Acc Standard
Swim Ladder Standard
Swim Platform Standard
Transom Door Standard
Wet bar Standard


Bimini Top Optional

Boats More Than 30 Feet

Engine Synchronizer Optional
Freezer Standard
Generator Optional
Glendinning Cablemaster Optional
Oil Change System Optional
Vacuum Optional


Hull Warranty

Deck Warranty
5-Year Yes
Engine Warranty
Engine warranties vary by manufacturer
NMMA Certification Yes
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