Test: Williams MX320 Jet Tender – 38 Knots From 90 HP

August 27 2026August 28 2026 Karel Overlaet, RIB Advocate

Williams MX320 Jet Tender Tested for Speed, Grip and Agility

In a previous post (here) I published a promo video of the MX280 and this one. Now it’s time for the test.

The Williams MX320 Jet Tender reached 74 km/h during testing with its 90 hp Rotax engine, exceptional performance from a 3.2-metre hull.

At 35 km/h, it completed a 180-degree turn in less than two boat lengths, demonstrating remarkably responsive jet-powered handling.

Despite weighing only around 250 kg, the Williams MX320 accommodates four adults plus one child and includes additional bow storage.

The smaller Williams MX280 uses a 60 hp engine and weighs approximately 235 kg, offering slightly calmer performance from its shorter hull.

Testing produced 39 mph, with 40 mph considered achievable in flatter water, confirming strong performance for this compact yacht tender.

This real test was published on the Williams Jet Tenders YouTube channel.

If you would like to watch videos more of these British built tenders, you can watch them here.

Specs

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Williams Turbojet 280MX 36 Knots Tender

August 21 2026August 21 2026 Karel Overlaet, RIB Advocate

TurboJet 280MX: New Compact Tender for Yachts

Williams Jet Tenders has introduced the TurboJet 280MX, a compact jet-powered tender aimed at yachts from 11 metres upwards.

Measuring 2,79 metres long and 1,54 metres wide, it weighs 230 kg dry and seats up to four people.

Power comes from a 60 hp BRP Rotax ACE 903 petrol engine, driving a jet propulsion system.

Williams lists a maximum speed of 67 km/h (36,18 knots) which is really fast.

The 28-litre fuel tank of this Turbojet 280MX supports short transfers and recreational use.

Standard equipment includes a multifunction display, forward-facing helm seat, automatic fire extinguisher, Hypalon tubes and SeaDek flooring.

A power limiter supports less experienced drivers during initial operation.

This promo reel was published on the Williams Jet Tenders YouTube channel.

If you would like to see more of these tenders, You can watch more Williams RIBs here.

Specs

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TurboJet 320MX: Compact Tender With BRP Rotax Power

August 19 2026August 28 2026 Karel Overlaet, RIB Advocate

TurboJet 320MX Claimed Top Speed of 38 knots

The Williams TurboJet 320MX is a compact jet tender designed for yachts between 14 and 20 metres.

At 3.19 metres long and 1.62 metres wide, it offers seating for four passengers plus the driver.

Power comes from a 90 hp BRP Rotax ACE 903 petrol engine, giving a claimed top speed of 72 km/h.

The tender weighs 255 kg dry and carries 28 litres of fuel.

Jet propulsion removes an exposed propeller and also allows operation in relatively shallow water.

A multifunction display provides speed, engine temperature, heading and fuel data.

Standard equipment includes Hypalon tubes, SeaDek flooring and an automatic fire extinguisher.

This promo reel was published on the Williams Jet Tenders YouTube channel.

If you would like to see more of these tenders, You can watch more Williams RIBs here.

Specs

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Esteban Ocon’s Williams Sportjet 520

August 13 2026August 19 2026 Karel Overlaet, RIB Advocate

French F1 Driver Esteban Ocon and His Sportjet 520

Formula 1 driver Esteban Ocon (Wikipedia) has taken delivery of a customised Williams Sportjet 520 for recreational use between races.

The model features a 230 hp Rotax engine and can accommodate up to seven people.

Its cockpit includes adjustable steering, a removable steering wheel and seating that converts into a sunpad.

Ocon selected a distinctive specification with red tubes, white upholstery and contrasting stitching.

During his first outing, he explored the local coastline and highlighted the boat’s agility.

The Sportjet 520 will mainly be used for leisure trips with friends and family.

This video was published on the Williams Jet Tenders YouTube channel.

If you like Williams jet-powered RIBs like Esteban Ocon, dive into my posts (videos).

Specs

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Introducing the All-new Turbojet 280MX and 320MX

August 12 2026August 28 2026 Karel Overlaet, RIB Advocate

Two Turbojet Powered RIB Tenders

The TurboJet MX brings a fresh approach to the established compact tender concept, combining low weight with agile handling and responsive performance.

Its compact dimensions are designed for yacht storage without sacrificing precise steering or acceleration.

The updated model targets owners seeking an entertaining tender for short transfers and recreational use.

Performance and manoeuvrability remain central to its design and onboard appeal.

This promo video was published on the Williams Jet Tenders YouTube channel.

If you fancy these tenders, You can watch more Williams RIBs here.

Related reading: What Is a Rigid Inflatable Boat? · What Size RIB Do I Need?