You have walked enough 90-footers to know the ritual. In through the aft door, across the saloon, down the stairs, and there is the owner's cabin — forward, below, with a porthole. It sits there because two side decks took the width out of the main deck, and almost everything in the class makes that trade without being asked.
The Sanlorenzo SL90A does not make it. There is one side deck instead of two, and the width that would have been the second walkway is inside the boat.
Who it's for
You spend real time aboard and you are the one who notices where the volume went. A main-deck owner's cabin with full-height glass is worth more to you than a fourth way to walk around the outside of your own boat.
You are also comfortable being early to something. Sanlorenzo has been building asymmetric boats across the SL range for years now, so this is a proven arrangement rather than a prototype, but it still reads as unusual at the dock and it will still be the first thing anyone asks you about.
Sanlorenzo lists three crew for the SL90A. That is a professionally run boat with a small team, not an owner-operator proposition — worth settling before the layout does the persuading.
Design and layout: one side deck, and where the width goes
Sanlorenzo's own line for the model is mastering the experience of asymmetry, elevating space and light into an unprecedented experience of freedom. Underneath the language the mechanism is plain, and the yard describes it plainly: an innovative layout that enhances space through asymmetry, placing the main deck saloon and owner's cabin on one level, with full-height windows for more luminosity and a greater sense of openness.
The detail that makes it work from outside is the yard's "One Way" glazing along the raised side. From the dock the profile reads as a continuous flank rather than an obviously lopsided boat. From the inside you are looking straight out through it.
What you gain is a single level — saloon and owner's cabin both on the main deck, no staircase between where you spend the evening and where you sleep. What you give up is the second side deck, which is real and matters for docking and crew movement. Walk it at a berth rather than at a boat show, and watch how a line gets handled from the side that is no longer there.
Performance: what Sanlorenzo publishes
Twin MAN 12V, 2,000 horsepower a side, for a published maximum of 29 knots. Fuel 9,000 litres — 2,378 US gallons. Fresh water 1,700 litres — 449 US gallons. Eight guests, three crew. Length overall 27.6 metres, which is 90 feet 7 inches, on a 6.5 metre beam.
Two comparisons inside the SL range are worth having in front of you. The SL86A, at 87 feet 3 inches, runs the identical engine package and publishes the identical 29 knots on 8,000 litres of fuel. The SL96A, at 95 feet 2 inches, carries more power — MTU 16V2000 M86s at 2,216 horsepower each — and publishes 28. Stepping through this range does not buy speed. It buys volume and tankage, and that is the honest way to price the decision.
Sanlorenzo publishes no cruise speed, no range, no draft and no displacement, for the SL90A or for any model in its fleet. Figures for all four circulate freely and some of them are probably close to right, but none of them came from the yard.
You can get to real ones. Take observed fuel burn from a sea trial at the speed you actually intend to hold, divide 9,000 litres by it, keep a reserve you would be comfortable explaining to an underwriter, and the number is yours instead of somebody's.
Ownership: the questions worth asking
Ask for the sea trial report, with observed speed and observed fuel burn at each rpm step. That one document replaces every range and consumption figure you will read about this boat anywhere else.
Ask for the build specification for draft and as-built weight. Sanlorenzo publishes neither, and draft in particular decides which anchorages you can use — if it governs your itinerary, make it a written condition of the build rather than a hope.
Ask about the crew arrangement. Three berths against eight guests is a tight brief; find out where the crew sleep, and how the galley and the single side deck work with the boat full.
And ask about the glazing. The One Way panels and the full-height windows are the reason the layout exists. Find out what replacing one costs and how long one takes to arrive, before you need to know.
Where to start
The SL90A earns your time if the main-deck owner's cabin is the thing you have not been able to find at this length. Walk an SL86A first if you can — same engines, same published speed, three feet four inches shorter — because that comparison tells you quickly whether you are buying the volume or just the idea.
Talk it through with Tony Smith — TS@MintedYachts.com or +1 (404) 805-9819 — or send the form on this page and we will come back with the yard's own documents.
Explore full specifications at YachtSpecsDirect.com
Browse available Sanlorenzo inventory at mintedyachts.com/sanlorenzo