Sealine S29 2005 vs Sealine S390 2021 - Boat Spec Comparison

Q: Which is the larger boat — the Sealine S29 2005 or the Sealine S390 2021?

The Sealine S390 2021 is the longer of the two at 39,4 feet overall. The Sealine S29 2005 comes in at 30,0 feet, making it roughly 9,4 ft shorter — a meaningful difference in deck room and overall on-water presence.

Q: Which boat can handle a bigger outboard?

The Sealine S390 2021 is rated to a maximum of 380 hp, giving it the larger power ceiling. The Sealine S29 2005 tops out at 160 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.

Q: How many people can each boat hold?

The Sealine S29 2005 is Coast Guard rated for 9 passengers, while the Sealine S390 2021 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.

Q: Which boat is wider, and does it affect trailering?

The Sealine S390 2021 measures 154" wide, compared to 126" for the Sealine S29 2005. 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.

Q: Which boat has the larger fuel tank — the Sealine S29 2005 or the Sealine S390 2021?

The Sealine S390 2021 has the bigger tank at 198 gallons, versus 126 gallons on the Sealine S29 2005. That 71-gallon difference translates to roughly 215–359 nautical miles of additional range at cruising speed, depending on motor, load, and conditions.

Q: Are the Sealine S29 2005 and Sealine S390 2021 from the same manufacturer?

Yes — both the Sealine S29 2005 and the Sealine S390 2021 are built by Sealine. 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.

Boat Comparison

Sealine S29 2005 vs Sealine S390 2021

Sealine

Sealine S29 2005

2005

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Sealine

Sealine S390 2021

2021

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Detailed Evaluation & Buyer Recommendation

Sealine S29 2005 vs Sealine S390 2021 — Same Brand, Different Boat

The Sealine S29 2005 vs Sealine S390 2021 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.

The power gap is worth calling out. Rated to 380 hp, the Sealine S390 2021 has a 220-hp advantage over the Sealine S29 2005's 160-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Sealine S390 2021 carries 198 gallons versus 126 gallons in the Sealine S29 2005. 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 Sealine S390 2021 is rated for 12 passengers, while the Sealine S29 2005 caps at 9. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Sealine S390 2021 could be the deciding factor.

Bottom line: Choose the Sealine S390 2021 if your priority is putting more people on the water — it handles 12 passengers and at 39,4 ft it has the deck room to back that rating up comfortably. The Sealine S29 2005 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 9 that costs less to run day-to-day.

Measurements / Dimensions

Length overall - Detail30.00 ft

Length overall - Detail39.40 ft

Length - Feet30

Length - Feet39.4

Length overall - Meters9.14

Length overall - Meters12.01

Length overall - Inches360

Length overall - Inches473

Beam10.50 ft

Beam12.80 ft

Beam - Meters3.2

Beam - Meters3.9

Beam - Inches126

Beam - Inches154

Draft [max] - Detailnot available

Draft [max] - Detail3.11 ft

Draft [max] - Metersnot available

Draft [max] - Meters0.95

Draft [max] - Inchesnot available

Draft [max] - Inches37

Displacementnot available

Displacement23192.00 lbs

Engine and Drivetrain

Fuel tank capacity - Gal126.2

Fuel tank capacity - Gal198

Fuel tank capacity - Liters477.72

Fuel tank capacity - Liters749.51

Engine makeVolvo Penta

Engine modelD3

Engine modelD6

Horsepower160 hp

Horsepower380 hp

Fuel typeDiesel

Fuel typenot available

Drive typeinboard

Engine 2 Engine MakeVolvo Penta

Engine 2 Engine ModelD3

Engine 2 Engine ModelD6

Engine 2 Horsepower160 hp

Engine 2 Horsepower380 hp

Engine 2 Fuel TypeDiesel

Engine 2 Fuel Typenot available

Engine 2 Drive Typeinboard

Operational Info

Sleeping capacity2

Sleeping capacity5

Cabins2

Head1

Water capacity50.2

Water capacity48

Boat typePower

Performance

Maximum speednot available

Maximum speed27

Maximum speed measurenot available

Maximum speed measureknots

Sealine S29 2005 vs Sealine S390 2021 — Common Questions

Which is the larger boat — the Sealine S29 2005 or the Sealine S390 2021?

The Sealine S390 2021 is the longer of the two at 39,4 feet overall. The Sealine S29 2005 comes in at 30,0 feet, making it roughly 9,4 ft shorter — a meaningful difference in deck room and overall on-water presence.

Which boat can handle a bigger outboard?

The Sealine S390 2021 is rated to a maximum of 380 hp, giving it the larger power ceiling. The Sealine S29 2005 tops out at 160 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 people can each boat hold?

The Sealine S29 2005 is Coast Guard rated for 9 passengers, while the Sealine S390 2021 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 Sealine S390 2021 measures 154" wide, compared to 126" for the Sealine S29 2005. 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 Sealine S29 2005 or the Sealine S390 2021?

The Sealine S390 2021 has the bigger tank at 198 gallons, versus 126 gallons on the Sealine S29 2005. That 71-gallon difference translates to roughly 215–359 nautical miles of additional range at cruising speed, depending on motor, load, and conditions.

Are the Sealine S29 2005 and Sealine S390 2021 from the same manufacturer?

Yes — both the Sealine S29 2005 and the Sealine S390 2021 are built by Sealine. 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.

← Sealine S29 2005 full specs ← Sealine S390 2021 full specs