Sanlorenzo Yachts SL78 2018 boat specs
Sanlorenzo Yachts
Sanlorenzo Yachts SL78 2018
2018
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Sanlorenzo Yachts The Alloy 2020 boat specs
Sanlorenzo Yachts
Sanlorenzo Yachts The Alloy 2020
2020
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Sanlorenzo Yachts SL78 2018 vs Sanlorenzo Yachts The Alloy 2020 — Same Brand, Different Boat

The Sanlorenzo Yachts SL78 2018 vs Sanlorenzo Yachts The Alloy 2020 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 Sanlorenzo Yachts The Alloy 2020 measures 144,0 feet overall (2020), giving it roughly 63,3 additional feet of deck space compared to the Sanlorenzo Yachts SL78 2018 at 80,7 feet (2018). Weight tells a clearer story for trailering families: the Sanlorenzo Yachts The Alloy 2020 tips the scales at 661 387 lbs — 515 882 lbs less than the Sanlorenzo Yachts SL78 2018 at 145 505 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 1 939 hp, the Sanlorenzo Yachts The Alloy 2020 has a 317-hp advantage over the Sanlorenzo Yachts SL78 2018's 1 622-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Sanlorenzo Yachts The Alloy 2020 carries 10 931 gallons versus 1 413 gallons in the Sanlorenzo Yachts SL78 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 Sanlorenzo Yachts The Alloy 2020 is rated for 43 passengers, while the Sanlorenzo Yachts SL78 2018 caps at 24. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Sanlorenzo Yachts The Alloy 2020 could be the deciding factor.

Bottom line: Choose the Sanlorenzo Yachts The Alloy 2020 if your priority is putting more people on the water — it handles 43 passengers and at 144,0 ft it has the deck room to back that rating up comfortably. The Sanlorenzo Yachts SL78 2018 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 24 that costs less to run day-to-day.
Measurements / Dimensions
Length overall - Detail80.70 ft
Length overall - Detail144.00 ft
Length - Feet80.7
Length - Feet144
Length overall - Meters24.6
Length overall - Meters43.89
Length overall - Inches968
Length overall - Inches1728
Beam18.80 ft
Beam29.50 ft
Beam - Meters5.73
Beam - Meters8.99
Beam - Inches226
Beam - Inches354
Draft [max] - Detail5.90 ft
Draft [max] - Detail7.20 ft
Draft [max] - Meters1.8
Draft [max] - Meters2.19
Draft [max] - Inches71
Draft [max] - Inches86
Displacement145505.00 lbs
Displacement661387.00 lbs
Engine and Drivetrain
Fuel tank capacity - Gal1413
Fuel tank capacity - Gal10931
Fuel tank capacity - Liters5348.78
Fuel tank capacity - Liters41378.32
Engine makeMTU
Engine makeMTU
Engine modelM96L 10V 2
Engine modelnot available
Horsepower1622 hp
Horsepower1939 hp
Fuel typeDiesel
Fuel typeDiesel
Drive typeinboard
Drive typeinboard
Engine 2 Engine MakeMTU
Engine 2 Engine MakeMTU
Engine 2 Engine ModelM96L 10V 2
Engine 2 Engine Modelnot available
Engine 2 Horsepower1622 hp
Engine 2 Horsepower1939 hp
Engine 2 Fuel TypeDiesel
Engine 2 Fuel TypeDiesel
Engine 2 Drive Typeinboard
Engine 2 Drive Typeinboard
Performance
Cruising speed25
Cruising speed20
Cruising speed measureknots
Cruising speed measureknots
Maximum speed30
Maximum speed22
Maximum speed measureknots
Maximum speed measureknots
Operational Info
Sleeping capacity1
Sleeping capacity1
Cabins4
Cabins5
Head5
Head5
Water capacity369
Water capacity2113
Boat typePower
Boat typePower

Sanlorenzo Yachts SL78 2018 vs Sanlorenzo Yachts The Alloy 2020 — Common Questions

Which is the larger boat — the Sanlorenzo Yachts SL78 2018 or the Sanlorenzo Yachts The Alloy 2020?
The Sanlorenzo Yachts The Alloy 2020 is the longer of the two at 144,0 feet overall. The Sanlorenzo Yachts SL78 2018 comes in at 80,7 feet, making it roughly 63,3 ft shorter — a meaningful difference in deck room and overall on-water presence.
Which is easier to trailer — the Sanlorenzo Yachts SL78 2018 or the Sanlorenzo Yachts The Alloy 2020?
For trailering, the Sanlorenzo Yachts SL78 2018 has the edge at 145 505 lbs dry weight versus 661 387 lbs for the Sanlorenzo Yachts The Alloy 2020. 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 Sanlorenzo Yachts The Alloy 2020 is rated to a maximum of 1 939 hp, giving it the larger power ceiling. The Sanlorenzo Yachts SL78 2018 tops out at 1 622 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 Sanlorenzo Yachts SL78 2018 is Coast Guard rated for 24 passengers, while the Sanlorenzo Yachts The Alloy 2020 is certified for 43. 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 Sanlorenzo Yachts The Alloy 2020 measures 354" wide, compared to 226" for the Sanlorenzo Yachts SL78 2018. 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 Sanlorenzo Yachts SL78 2018 or the Sanlorenzo Yachts The Alloy 2020?
The Sanlorenzo Yachts The Alloy 2020 has the bigger tank at 10 931 gallons, versus 1 413 gallons on the Sanlorenzo Yachts SL78 2018. That 9518-gallon difference translates to roughly 28554–47590 nautical miles of additional range at cruising speed, depending on motor, load, and conditions.
Are the Sanlorenzo Yachts SL78 2018 and Sanlorenzo Yachts The Alloy 2020 from the same manufacturer?
Yes — both the Sanlorenzo Yachts SL78 2018 and the Sanlorenzo Yachts The Alloy 2020 are built by Sanlorenzo 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.