Interboat Intender 850 for sale (2026) in Wargrave, Berkshire, United Kingdom

The Intender 850 is the larger sibling of the Intender 820, building on its significant success. This boat features a spacious aft sun-pad, a port side walk-through, luxurious cockpit seating, and a variety of optional extras. The engine is cleverly positioned under the cockpit floor, maximizing floor space, while the overall layout enhances the size of the forward toilet compartment.

A range of engine options is available, from 42hp to 250hp. This model includes a keel and shaft drive, offering relaxed and predictable slow-speed handling. The diverse specification options make this boat ideal for leisurely cruises up the Thames or exploring the Solent.

10 year hull warranty

Photographs shown for illustration only - boats are built to order.

Standard Specification

• 60cm Steering wheel 
• Freestanding steering column with cupholders and stainless steel handrail
• Rope fendering with Turkish knot (black or beige)
• Solid engine foundation with fibreglass laminated steel
• Automatic fire extinguishing system 
• Water separator/coarse filter
• Fuel valve
• Fuel tank with fuel gauge
• Stainless steel flagpole and ensign
• Stainless steel skeg to provide rudder and propeller protection (up to 75hp)
• Stainless steel protection strip around swimming platform
• Extensive under-seat cockpit storage
• Insulated cool box 70L in port bench
• Anchor locker
• USB/12 volt connection on steering column
• Navigation lights
• Manual bilge pump
• Stainless steel swimming ladder
• Sprayhood with cover
• Sprayhood with removable front and side panels
• Comfort plus Sunbrella® cushion set with back cushions  
• Coloured waterline

Optional Extras

• Different coloured fibreglass floor
• Stainless steel pulpit bow railings
• Stainless steel handrails on portside and starboard consoles
• Puddening on rope fendering
• Rubber D fender instead of rope fendering
• Boarding pole
• Luxury steering wheel 60cm
• 70cm Steering wheel 
• Luxury 70cm steering wheel 
• Champagne bucket with holder  
• Bowthruster 35kgf
• Bluetooth audio system with 4 speakers
• Cockpit lights
• Compressor fridge 50 ltr in starboard console 
• Compressor cooler in cool box portside bench 
• Teak cupboard in port console
• Flush toilet with waste tank
• Sink with cold water tap in port console with Esthec lid
• Deck shower 
• USB/12V connection above fridge
• Raymarine I40 Bidata
• Chart plotter
• 2000W Inverter with Nespresso machine
• Combi charger/shore power/inverter 2000W with remote control 
• Electric anchor winch with chain
• Electric bilge pump with float switch
• Rudder indicator  
• Esthec® on swimming platform
• Esthec® on cockpit floor 
• Esthec® trim along gangway and foredeck    
• Esthec® trim on cabin roof
• Esthec® trim top of port and starboard consoles
• Folding cockpit table
• Removable sunbed with cushions
• Armrests with stainless steel cupholders
• Scatter cushions 
• Bimini sunshade
• Extended bimini sunshade with connector piece
• Blinds for sprayhood
• Upholstery material upgrade 
• Quilted back cushions (only with upgraded upholstery)
• Easy cabrio system (for easy fitting of spray hood poppers)
• Winter cover
• Loose helm seat booster

Engine Options

• 42 hp Vetus diesel - 7 knots maximum
• 52 hp Vetus diesel - 9 knots maximum
• 80 hp Yanmar common rail diesel - 12 knots maximum*
• 170 hp Yanmar common rail diesel - 19 knots maximum**
• 250 hp Yanmar common rail diesel - 25 knots maximum***       

 * Incl. hydraulic steering

** Incl. hydraulic steering, appr 350 litre diesel tank and Zipwake trim system