Detailed Evaluation & Buyer Recommendation
Sea Doo RXT-X 325 2025 vs Sea-Doo Sportster 1800 1999 — Same Brand, Different Boat
The Sea Doo RXT-X 325 2025 vs Sea-Doo Sportster 1800 1999 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 Sea Doo RXT-X 325 2025 measures 135,8 feet overall (2025), giving it roughly 118,8 additional feet of deck space compared to the Sea-Doo Sportster 1800 1999 at 17,0 feet (1999). Weight tells a clearer story for trailering families: the Sea Doo RXT-X 325 2025 tips the scales at 642 lbs — 466 lbs more than the Sea-Doo Sportster 1800 1999 at 176 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 power gap is worth calling out. Rated to 325 hp, the Sea Doo RXT-X 325 2025 has a 150-hp advantage over the Sea-Doo Sportster 1800 1999's 175-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Sea Doo RXT-X 325 2025 carries 19 gallons versus 4 gallons in the Sea-Doo Sportster 1800 1999. 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 Sea Doo RXT-X 325 2025 is rated for 41 passengers, while the Sea-Doo Sportster 1800 1999 caps at 7. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Sea Doo RXT-X 325 2025 could be the deciding factor.
Bottom line: Choose the Sea Doo RXT-X 325 2025 if your priority is putting more people on the water — it handles 41 passengers and at 135,8 ft it has the deck room to back that rating up comfortably. The Sea-Doo Sportster 1800 1999 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 7 that costs less to run day-to-day.
Measurements / Dimensions
Length overall - Detail135.80 ft
Length overall - Detail17 ft. 11 in. (5.46 m)
Length - Feet135.8
Length - Feet17
Length overall - Meters41.39
Length overall - Meters5.46
Length overall - Inches1630
Length overall - Inches215
Beam49.20 ft
Beam7 ft. 6 in. (2.29 m)
Beam - Meters15
Beam - Meters2.29
Beam - Inches590
Beam - Inches9
Displacement642.00 lbs
Displacementnot available
Draft [max] - Detailnot available
Draft [max] - Detail12 in. (.3 m)
Draft [max] - Metersnot available
Draft [max] - Meters0.3
Draft [max] - Inchesnot available
Draft [max] - Inches12
Weight - Detailnot available
Weight - Detail1,760 lbs. (800 kgs)
Weight - kgnot available
Weight - kg798.32
Weight - lbs.not available
Weight - lbs.176
Length - Metersnot available
Length - Meters5.46
Length - Inchesnot available
Length - Inches11
Engine and Drivetrain
Fuel tank capacity - Gal18.5
Fuel tank capacity - Gal4
Fuel tank capacity - Liters70.03
Fuel tank capacity - Liters151.42
Engine makeRotax
Engine makenot available
Engine model1630 ACE
Engine modelnot available
Horsepower325 hp
Horsepowernot available
Fuel typeGas
Fuel typenot available
Engine/s standardnot available
Engine/s standardTwin Rotax 718 cc, Twin Cylinder, Two Stroke, Liquid Cooled, and R.A.V.E
Impellernot available
ImpellerProgressive pitch, stainless steel
Jet pumpnot available
Jet pumpAxial flow, single stage
Fuel systemnot available
Fuel systemMikuni BN 40-38 per engine with accelerator pumps
Fuel tank capacity - Detailnot available
Fuel tank capacity - Detail40 gal. (151 l)
Drive typenot available
Drive typeJet Drive
Engine maxnot available
Engine max175 hp
Batterynot available
Battery12-volt
Lubricationnot available
LubricationVariable Rate Oil Injection
Oil capacity - Detailnot available
Oil capacity - Detail2.3
Oil capacity - Litersnot available
Oil capacity - Liters8.71
Operational Info
TrailerableYes
Trailerablenot available
Boat typePower
Boat typenot available
Maximum capacitynot available
Maximum capacity1,245 lbs. (565 kgs)
Maximum peoplenot available
Maximum people7
General Boat Info
Makenot available
MakeSea-Doo
Modelnot available
ModelSportster 18
Model Yearnot available
Model Year1999