Monterey 278SS 2008 boat specs
Monterey
Monterey 278SS 2008
2008
View full specs →
VS
Monterey 318SSX 2009 boat specs
Monterey
Monterey 318SSX 2009
2009
View full specs →

Monterey 278SS 2008 vs Monterey 318SSX 2009 — Same Brand, Different Boat

Matching a modified vee Monterey 278SS 2008 against a deep vee Monterey 318SSX 2009 means you're likely deciding between two genuinely different on-water experiences. Hull type shapes everything from ride quality and fuel burn to dock handling and resale trajectory.

On paper these two are close siblings in the size department — Monterey 278SS 2008 at 28,0 ft versus Monterey 318SSX 2009 at 31,0 ft. At 55 lbs and 8 lbs respectively, both sit in a similar weight class — either should pair comfortably with most mid-size SUVs and half-ton trucks, though always confirm your specific tow rating with the motor added.

The power gap is worth calling out. Rated to 425 hp, the Monterey 278SS 2008 has a 105-hp advantage over the Monterey 318SSX 2009's 320-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Monterey 318SSX 2009 carries 142 gallons versus 89 gallons in the Monterey 278SS 2008. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.

The Monterey 278SS 2008 is rated for up to 8 people. Passenger data for the Monterey 318SSX 2009 wasn't available.

Bottom line: The Monterey 318SSX 2009 at 31,0 ft is the right call if deck space, comfort, and entertaining are top of your list. The Monterey 278SS 2008 at 28,0 ft wins on trailering ease, likely lower purchase price, and simpler docking — a solid choice for a buyer who wants more boat for less money.
General Boat Info
MakeMonterey
MakeMonterey
Model278SS
Model318SSX
Model Year2008
Model Year2009
Measurements / Dimensions
Beam8 ft. 6 in. (2.6 m)
Beam9 ft. 6 in. (2.9 m)
Beam - Meters2.59
Beam - Meters2.9
Beam - Inches102
Beam - Inches114
Deadrise21℃
Deadrise22℃
Weight - Detail5,500 lbs. (2,495 kg)
Weight - Detail8,000 lbs. (3,629 kg)
Weight - kg2494.76
Weight - kg3628.74
Weight - lbs.55
Weight - lbs.8
Length - Meters8.8
Length - Meters9.7
Length - Feet28
Length - Feet31
Length - Inches1
Length - Inches1
Length overall - Detail28 ft. 10 in. (8.8 m)
Length overall - Detailnot available
Length overall - Meters8.79
Length overall - Metersnot available
Length overall - Inches346
Length overall - Inchesnot available
Bridge clearance - Detailnot available
Bridge clearance - Detail8 ft. 0 in. (2.4 m) with arch
Bridge clearance - Metersnot available
Bridge clearance - Meters2.44
Bridge clearance - Inchesnot available
Bridge clearance - Inches96
Draft [drive up] - Detailnot available
Draft [drive up] - Detail24 in. (61 cm)
Draft [drive up] metersnot available
Draft [drive up] meters0.61
Draft [drive up] inchesnot available
Draft [drive up] inches24
Draft [max] - Detailnot available
Draft [max] - Detail36 in. (91.4 cm)
Draft [max] - Metersnot available
Draft [max] - Meters0.91
Draft [max] - Inchesnot available
Draft [max] - Inches36
Length [over all with swim platform]not available
Length [over all with swim platform]31 ft. 10 in. (9.7 m)
Body / Hull
Hull materialFiberglass
Hull materialFiberglass
Hull typeModified Vee
Hull typeDeep Vee
Engine and Drivetrain
Engine/s standardMerc 350MAG BRIII 300 hp
Engine/s standardTwin Volvo 5.0 l GXI 270 hp DP
Fuel tank capacity - Detail89 gal. (337 l)
Fuel tank capacity - Detail142 gal. (538 l)
Fuel tank capacity - Liters336.9
Fuel tank capacity - Liters537.53
Fuel tank capacity - Gal89
Fuel tank capacity - Gal142
Fuel typeGas
Fuel typeGas
Drive typeInboard
Drive typeInboard - Twin
Engine max425 hp (316 kW)
Engine maxT-320 hp (T-238.6 kW)
Operational Info
Water capacity15 gal. (57 l)
Water capacity15 gal. (57 l)
Holding tank capacity - Detail16 gal. (61 l)
Holding tank capacity - Detail18 gal. (68 l)
Holding tank capacity - Liters60.57
Holding tank capacity - Liters68.14
Holding tank capacity - Gal16
Holding tank capacity - Gal18
Headnot available
HeadEnclosed
Headroomnot available
HeadroomMaximum: 4 ft. 9 in. (1.4 m)
Water heater capacitynot available
Water heater capacity6 gal. (22 l)

Monterey 278SS 2008 vs Monterey 318SSX 2009 — Common Questions

Which is the larger boat — the Monterey 278SS 2008 or the Monterey 318SSX 2009?
The Monterey 318SSX 2009 is the longer of the two at 31,0 feet overall. The Monterey 278SS 2008 comes in at 28,0 feet, making it roughly 3,0 ft shorter — a meaningful difference in deck room and overall on-water presence.
Which is easier to trailer — the Monterey 278SS 2008 or the Monterey 318SSX 2009?
For trailering, the Monterey 318SSX 2009 has the edge at 8 lbs dry weight versus 55 lbs for the Monterey 278SS 2008. 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.
Which boat can handle a bigger outboard?
The Monterey 278SS 2008 is rated to a maximum of 425 hp, giving it the larger power ceiling. The Monterey 318SSX 2009 tops out at 320 hp. Keep in mind that maximum ratings are just that — matching the motor to the actual load and usage pattern usually matters more than chasing the ceiling.
How many passengers can the Monterey 278SS 2008 carry?
The Monterey 278SS 2008 has an official capacity rating of 8 people. Capacity data wasn't available for the other model in this comparison — verify directly with the dealer.
Which boat is wider, and does it affect trailering?
The Monterey 318SSX 2009 measures 114" wide, compared to 102" for the Monterey 278SS 2008. 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 Monterey 278SS 2008 or the Monterey 318SSX 2009?
The Monterey 318SSX 2009 has the bigger tank at 142 gallons, versus 89 gallons on the Monterey 278SS 2008. That 53-gallon difference translates to roughly 159–265 nautical miles of additional range at cruising speed, depending on motor, load, and conditions.
Are the Monterey 278SS 2008 and Monterey 318SSX 2009 from the same manufacturer?
Yes — both the Monterey 278SS 2008 and the Monterey 318SSX 2009 are built by Monterey. 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.