Detailed Evaluation & Buyer Recommendation
Sea Ray 520 Sedan Bridge 2013 vs Sea Ray SDX 270 Outboard 2018: Same Brand, Different Boat
The Sea Ray 520 Sedan Bridge 2013 vs Sea Ray SDX 270 Outboard 2018 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 Ray 520 Sedan Bridge 2013 measures 52,3 feet overall (2013), giving it roughly 23,1 additional feet of deck space compared to the Sea Ray SDX 270 Outboard 2018 at 29,2 feet (2018). Weight tells a clearer story for trailering families: the Sea Ray 520 Sedan Bridge 2013 tips the scales at 51 000 lbs - 45 340 lbs more than the Sea Ray SDX 270 Outboard 2018 at 5 660 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 641 hp, the Sea Ray 520 Sedan Bridge 2013 has a 391-hp advantage over the Sea Ray SDX 270 Outboard 2018's 250-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 Ray 520 Sedan Bridge 2013 carries 500 gallons versus 65 gallons in the Sea Ray SDX 270 Outboard 2018. 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 Ray 520 Sedan Bridge 2013 is rated for 15 passengers, while the Sea Ray SDX 270 Outboard 2018 caps at 8. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Sea Ray 520 Sedan Bridge 2013 could be the deciding factor.
Bottom line: Choose the Sea Ray 520 Sedan Bridge 2013 if your priority is putting more people on the water - it handles 15 passengers and at 52,3 ft it has the deck room to back that rating up comfortably. The Sea Ray SDX 270 Outboard 2018 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 8 that costs less to run day-to-day.
General Boat Info
MakeSea Ray
Makenot available
Model520 Sedan Bridge
Modelnot available
Model Year2013
Model Yearnot available
Measurements / Dimensions
Beam15 ft. 3 in. (4.65 m)
Beam8.60 ft
Beam - Meters4.65
Beam - Meters2.62
Beam - Inches183
Beam - Inches103
Deadrise15℃
Deadrisenot available
Draft [max] - Detail51 in. (130 cm)
Draft [max] - Detail3.20 ft
Draft [max] - Meters1.3
Draft [max] - Meters0.98
Draft [max] - Inches51
Draft [max] - Inches38
Weight - Detail51,000 lbs. (23,133 kg)
Weight - Detailnot available
Weight - kg23133.19
Weight - kgnot available
Weight - lbs.51000
Weight - lbs.not available
Length - Feet52.25
Length - Feet29.2
Length [over all with swim platform]56 ft. 5 in. (17.2 m)
Length [over all with swim platform]not available
Length overall - Detail52 ft. 3 in. (16 m)
Length overall - Detail29.20 ft
Length overall - Meters15.93
Length overall - Meters8.9
Length overall - Inches627
Length overall - Inches350
Draft Minnot available
Draft Min2.20 ft
Displacementnot available
Displacement5660.00 lbs
Body / Hull
Hull materialFiberglass
Hull materialnot available
Hull typeSemi Displacement
Hull typenot available
Engine and Drivetrain
Engine makeCummins®
Engine makeMercury
Engine/s standardTwin QSM-11 670 T2 with DTS
Engine/s standardnot available
Fuel tank capacity - Detail500 gal. (1,892 l)
Fuel tank capacity - Detailnot available
Fuel tank capacity - Liters1892.71
Fuel tank capacity - Liters246.05
Fuel tank capacity - Gal500
Fuel tank capacity - Gal65
Fuel typeDiesel
Fuel typeGas
Drive typeInboard - Twin
Drive typeoutboard
HorsepowerTwin 641 php (477 kW)
Horsepower250 hp
Engine modelnot available
Engine model250HP Verado®
Operational Info
Water capacity140 gal. (530 l)
Water capacity20
Holding tank capacity - Detail68 gal. (257 l)
Holding tank capacity - Detailnot available
Holding tank capacity - Liters257.41
Holding tank capacity - Litersnot available
Holding tank capacity - Gal68
Holding tank capacity - Galnot available
Boat typenot available
Boat typePower