Wed. Nov 26th, 2025

The Relcraft 23 Sapphire is a classic British-built motor cruiser known for its deep V-hull and stable, smooth ride. Designed by John Moxham, it was originally built by Reliance Marine Services Ltd.

Key Specifications
Specifications for the Relcraft 23 Sapphire can vary depending on the exact build year and any modifications made by previous owners, as many have been refurbished over the years.

Attribute 
Specification (Approximate)
Length (LOA) 7.01m (23 ft) to 7.92m
Beam 2.90m (9.5 ft) to 3.05m (10 ft)
Draft ~0.76m (2.5 ft)
Hull Material Fiberglass (GRP)
Hull Type Planing, deep V-hull
Displacement ~1,850 kg
Berths 2 to 4 berths
Optimal Persons on Board 6

Engine and Performance
The Relcraft 23 was designed to plane at relatively low speeds (around 11 knots) and was often fitted with a variety of engine options.

Original Engine: The boat often came with a Volvo 140 HP engine, which provided a maximum speed of around 26 knots.
Alternative Options: Owners have fitted various engines, including Volvo Penta D41 diesel engines (achieving speeds up to 29 knots) or a USA Marine V8 6.5L supercharged diesel (reaching up to 38 knots in a sports fisher variant).
Fuel Efficiency: The hull design allows it to plane with less power than some other boats its size, making it potentially economical on fuel depending on the engine setup.

Reviews and Reputation
Owners and reviewers praise the Relcraft 23 Sapphire for the following qualities:

Ride Quality: The deep V-hull provides a nice, smooth ride, especially in choppier conditions.
Solid Build: The hull mouldings are generally considered to be of a high standard.
Interior: While the factory finish was considered basic by some, the cabin is functional and can be upgraded for profit. The cockpit is often described as deep and safe for families.

Availability
Used Relcraft Sapphire 23 boats are frequently available for sale through online boat marketplaces and brokers across the UK and Europe. You can find current listings on specialist websites such as Apollo Duck or Boatsforsale.co.uk.

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