Tiara Yachts 3100 Coronet 2012 boat specs
Tiara Yachts
Tiara Yachts 3100 Coronet 2012
2012
View full specs →
VS
Tiara Yachts 3800 Open 2006 boat specs
Tiara Yachts
Tiara Yachts 3800 Open 2006
2006
View full specs →

Tiara Yachts 3100 Coronet 2012 vs Tiara Yachts 3800 Open 2006 — Same Brand, Different Boat

The Tiara Yachts 3100 Coronet 2012 vs Tiara Yachts 3800 Open 2006 comparison sits squarely in the category of decisions where specs alone won't tell the whole story — intended use, storage, and long-term ownership costs all factor in.

Size is the most obvious dividing line here. The Tiara Yachts 3100 Coronet 2012 measures 33,1 feet overall (2012), giving it roughly 29,1 additional feet of deck space compared to the Tiara Yachts 3800 Open 2006 at 4,0 feet (2006). Weight tells a clearer story for trailering families: the Tiara Yachts 3100 Coronet 2012 tips the scales at 1 355 lbs — 1 129 lbs more than the Tiara Yachts 3800 Open 2006 at 226 lbs. That difference is meaningful if you're working within a half-ton or three-quarter-ton truck's tow rating, especially once you factor in a motor, gear, and fuel.

The Tiara Yachts 3100 Coronet 2012 carries a rated maximum of 375 hp. Engine data for the Tiara Yachts 3800 Open 2006 wasn't available in our records — check the manufacturer's spec sheet before sizing a motor.Fuel capacity breaks the other way: the Tiara Yachts 3800 Open 2006 carries 411 gallons versus 21 gallons in the Tiara Yachts 3100 Coronet 2012. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.

For family outings this is probably the sharpest distinction between the two. The Tiara Yachts 3800 Open 2006 is rated for 12 passengers, while the Tiara Yachts 3100 Coronet 2012 caps at 10. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Tiara Yachts 3800 Open 2006 could be the deciding factor.

Bottom line: Choose the Tiara Yachts 3800 Open 2006 if your priority is putting more people on the water — it handles 12 passengers and at 4,0 ft it has the deck room to back that rating up comfortably. The Tiara Yachts 3100 Coronet 2012 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 10 that costs less to run day-to-day.
General Boat Info
MakeTiara Yachts
MakeTiara Yachts
Model3100 Coronet
Model3800 Open
Model Year2012
Model Year2006
Measurements / Dimensions
Beam12 ft. 6 in. (3.81 m)
Beam14 ft. 2 in. (4.32 m)
Beam - Meters3.81
Beam - Meters4.32
Beam - Inches15
Beam - Inches17
Deadrise14℃
Deadrise18℃
Draft [max] - Detail2 ft. 8 in. (0.8 m) with props
Draft [max] - Detail3 ft. 6 in. (1.06 m) w/props
Draft [max] - Meters0.81
Draft [max] - Meters1.07
Draft [max] - Inches32
Draft [max] - Inches42
Weight - Detail13,550 lbs. (6,146 kg) gas
Weight - Detail22,600 lbs. (10,251 kg)
Weight - kg6146.17
Weight - kg10251.18
Weight - lbs.1355
Weight - lbs.226
Height - Detail8 ft. (2.44 m) waterline to top of standard arch
Height - Detailnot available
Height - Meters2.44
Height - Metersnot available
Height - Inches96
Height - Inchesnot available
Length - Feet33.08
Length - Feet4
Length [over all with swim platform]36 ft. 5 in. (11.1 m) with standard pulpit and standard 40 in. swim platform
Length [over all with swim platform]not available
Length overall - Detail33 ft. 1 in. (10.08 m) with standard pulpit 30 ft. 6 in. (9.29 m) without standard pulpit
Length overall - Detail40 ft. 9 in. (12.42 m) w/standard pulpit 38 ft. 4 in. (11.69 m) w/out standard pulpit
Length overall - Meters10.08
Length overall - Meters12.42
Length overall - Inches397
Length overall - Inches489
Length - Metersnot available
Length - Meters12.42
Length - Inchesnot available
Length - Inches9
Body / Hull
Hull materialFiberglass
Hull materialnot available
Hull typeDeep Vee
Hull typenot available
Engine and Drivetrain
Fuel tank capacity - Detail210 gal. (794.9 l)
Fuel tank capacity - Detail411 U.S. gal. (1,556 l)
Fuel tank capacity - Liters794.94
Fuel tank capacity - Liters1555.8
Fuel tank capacity - Gal21
Fuel tank capacity - Gal411
Fuel typeGas or Diesel
Fuel typenot available
Drive typeInboard - Twin
Drive typeI/O
Engine maxTwin 375 hp
Engine maxnot available
Engine/s standardnot available
Engine/s standardTwin Cummins QSC8.3 diesels, 490 hp
Operational Info
Headroom5 ft. 8 in. (1.73 m)
Headroomnot available
Sleeping capacity2
Sleeping capacity5
Water capacity33 gal. (124.92 l)
Water capacity110 U.S. gal. (416 l)
Holding tank capacity - Detail20 gal. (75.71 l)
Holding tank capacity - Detail40 U.S. gal. (151 l)
Holding tank capacity - Liters75.71
Holding tank capacity - Liters151.42
Holding tank capacity - Gal2
Holding tank capacity - Gal4

Tiara Yachts 3100 Coronet 2012 vs Tiara Yachts 3800 Open 2006 — Common Questions

Which is the larger boat — the Tiara Yachts 3100 Coronet 2012 or the Tiara Yachts 3800 Open 2006?
The Tiara Yachts 3100 Coronet 2012 is the longer of the two at 33,1 feet overall. The Tiara Yachts 3800 Open 2006 comes in at 4,0 feet, making it roughly 29,1 ft shorter — a meaningful difference in deck room and overall on-water presence.
Which is easier to trailer — the Tiara Yachts 3100 Coronet 2012 or the Tiara Yachts 3800 Open 2006?
For trailering, the Tiara Yachts 3800 Open 2006 has the edge at 226 lbs dry weight versus 1 355 lbs for the Tiara Yachts 3100 Coronet 2012. Add a motor (typically 300–500 lbs for an outboard in this class), gear, and a partial fuel load and the difference grows. Lighter is friendlier on smaller tow vehicles and on fuel economy while hauling.
What is the maximum horsepower rating for these boats?
The Tiara Yachts 3100 Coronet 2012 has a documented max rating of 375 hp. Engine specifications for the Tiara Yachts 3800 Open 2006 were not available in our database — check the OEM spec sheet or manufacturer's website for confirmation.
How many people can each boat hold?
The Tiara Yachts 3100 Coronet 2012 is Coast Guard rated for 10 passengers, while the Tiara Yachts 3800 Open 2006 is certified for 12. Note that legal capacity and comfortable capacity aren't always the same thing — on a full day out, most experienced boaters aim for about 80% of the rated number to keep things comfortable.
Which boat is wider, and does it affect trailering?
The Tiara Yachts 3800 Open 2006 measures 17" wide, compared to 15" for the Tiara Yachts 3100 Coronet 2012. The US standard-width towing limit is 8’6" (102") in most states — anything over that may need a wide-load permit. Confirm your specific route requirements with each state's DOT.
Which boat has the larger fuel tank — the Tiara Yachts 3100 Coronet 2012 or the Tiara Yachts 3800 Open 2006?
The Tiara Yachts 3800 Open 2006 has the bigger tank at 411 gallons, versus 21 gallons on the Tiara Yachts 3100 Coronet 2012. That 390-gallon difference translates to roughly 1170–1950 nautical miles of additional range at cruising speed, depending on motor, load, and conditions.
Are the Tiara Yachts 3100 Coronet 2012 and Tiara Yachts 3800 Open 2006 from the same manufacturer?
Yes — both the Tiara Yachts 3100 Coronet 2012 and the Tiara Yachts 3800 Open 2006 are built by Tiara Yachts. That means shared dealer networks, common parts availability, and consistent build quality across the line. The choice between them is essentially a question of how much boat you need, not which brand you trust.