Two Sunseekers carry the same engine designation. One of them is quoted at 30 knots and the other at 20.
The 100 Yacht: twin MTU 12V 2000 M96X, 219,095 lbs at half load, up to 30 knots.
The 134 Yacht: twin MTU 12V 2000 M96X, 426,396 lbs at half load, up to 20 knots.
An increase of 207,301 lbs, on the same power unit family, takes ten knots off the top. If you want a single fact that explains what happens at the top of a yacht range, that is it, and it is more instructive than any amount of description.
The specification
Length overall is 132' 8". Beam is 26' 1". Draft is 7' 10", a maximum at full load, which is how Sunseeker publishes every draft figure in its range. Displacement is 426,396 lbs at half load, the condition Sunseeker uses throughout its range.
Accommodation is five cabins and five heads, plus crew quarters. Fuel is 6,538 US gallons. Fresh water is 1,413 US gallons. Power is twin MTU 12V 2000 M96X, and the yard quotes up to 20 knots.
At 132' 8" it is the largest boat in a line that starts with the 76 Yacht at 77' 5" and runs through the 95 Yacht at 92' 1" and the 100 Yacht at 98' 3".
The extra length did not buy bedrooms
This is the part most buyers get wrong when they step up.
The 100 Yacht publishes five cabins and six heads plus crew. The 134 Yacht, 34 feet and five inches longer, publishes five cabins and five heads plus crew. Same guest cabin count. One fewer head.
What the length bought is volume and endurance. Beam goes from 22' 11" to 26' 1", 38 inches wider. Fuel goes from 3,381 US gallons to 6,538, close to double. Fresh water goes from 476 US gallons to 1,413, close to triple.
Read that as a description of intent. The 134 is not a yacht that sleeps more people. It is a yacht that carries the same people in much larger spaces, with the crew and service capacity to run properly and the tankage to stay away from a dock while doing it.
Say the CGI part out loud
Every image of the 134 Yacht in circulation is a computer rendering. The yacht is unreleased. Nobody has walked its interior, nobody has run it at sea, and everything shown of its finish and its flow is design intent rather than an observed room.
That is entirely normal at this size and it is not a criticism of the yard. But it changes what buying looks like. On the 100 Yacht below it, you can stand on a built boat: it is the only flagship in Sunseeker's range presented in photography rather than renderings, and it is being shown at Cannes in September 2026. On the 134 you are buying a drawing, a hull number and a contract.
So the interior conversation is a document conversation. The arrangement drawing and the equipment list attached to your hull are the specification, and there is no substitute for reading them line by line.
The numbers are still design targets
This follows from the renderings rather than sitting apart from them. A yacht that has not been built has not been weighed at its rigged weight, has not been run at your cruising rpm, and has not had its consumption recorded with a real load aboard.
The instinct at this point is to go hunting for the definitive figure somewhere. That is the wrong exercise. The useful reading is that the performance data on an unreleased design is not settled yet, which is a reasonable state of affairs pre-delivery and precisely the reason to put your numbers into your contract instead of taking them off a page.
The segment
The Sanlorenzo SD132 is 133' 6" on a 27' 10" beam, published as ten guests and eight crew, 11,095 US gallons of fuel, 17 knots maximum on twin MAN V12s.
The Riva 130' Bellissima is 131' 3" on a 25' 10" beam, five cabins and four crew cabins, 4,491 gallons, 22 knots maximum with a published 19-knot cruise.
The Benetti B.YOND 40M is 130' 11" on a 28' 3" beam, five guest cabins and six crew cabins, 17,436 gallons, 14 knots maximum with a published 12-knot cruise on twin MAN V12-1400s.
Against those three the Sunseeker at up to 20 knots is faster than the Sanlorenzo and much faster than the Benetti, and slower than the Riva. It carries the second-lowest fuel capacity of the four, which is consistent rather than contradictory: the Benetti and the Sanlorenzo are built around slow, long-legged operation and carry the tanks for it. The Sunseeker is the faster, narrower yacht in a group that mostly is not trying to be one.
Worth remembering while you read that table: the other three are delivered boats and this one is a design.
Four things to get in writing
The MTU rating as it will be installed. Named on the contract, with the figure a side.
Rigged weight and tankage as fitted. 426,396 lbs at half load, 6,538 gallons of fuel and 1,413 of fresh water are the model figures. Confirm each against your hull.
Observed consumption at cruise, in the trial protocol. On an unreleased yacht there is no sea trial to attend until yours, so write the requirement into the contract now.
The arrangement drawing and equipment schedule for your hull. On a yacht that exists only in renderings, these are the only documents that describe what you are actually buying.
The verdict
The 134 Yacht is a coherent flagship. It takes the 100 Yacht's five guest cabins into a much larger, much heavier hull with close to triple the fresh water and double the fuel, and it holds 20 knots doing it, which is quick for this displacement and this segment.
Buy it as a commission rather than as a purchase. The renderings are design intent, the performance figures are design targets, and the contract carries every number that matters.