A perfect boat for family holidays. Limited length, good price, light engines and a lot of space. Jeanneau’s boating experience is evident in this project, together with the advantages of a mass production (costs are cheaper, construction is excellent thanks to the development of the entire production system) and the collaboration with Garroni Design’s interior architects.
The two cabins are separated: one has a fore entrance (picture below), while the other one has an astern entrance. This is an unusual solution on a so long boat ( 12 m long) but it allows a better circulation on board ( the boat seems never full) and even more privacy to passengers.
The central zone of the boat, equipped with a large table, has been raised a little in order to obtain more space in the fore cabin, an excellent 360-degree view for the captain (even if the seat is not adjustable) and a beautiful view on the sea for those who have lunch here.
The cabin underneath is rather large, with a maximum height of 186 cm and 96 cm over the bed. It is not an imperial suite, but it is very bright and comfortable, with a private bathroom and a  separated shower.
The fore cabin is more traditional but very functional, with a L-shape bed and a private bathroom. It is less high than the previous one (191 cm) and the berth is a little narrower (195 x 150 cm).
On the main deck, directly linked to the cockpit, there is a kitchen, another strong point of the boat. It is spacious (133 x 76 cm), well-arranged and very functional. The fridge is on the left, near the stepladder to reach the fly. This way, the helmsman has a good free view when he gears in reverse.
The fly is not, and it cannot be, large but it offers a more than respectable surface. The sunbathing platform is large and the cockpit enjoys a wonderful view.  The big astern pilot house (370 x 132 cm) is available even in a submergable version. Channels are very large (30 cm) and protected.
Performances are aligned with the boat’s philosophy, with cheap purchase and management costs.Â
The engines are two 300 HP IPS Volvo Penta ( the shipbuilder has added a small 80cm axis to balance weight). There is also the possibility to choose two 370 HP IPS engines, even if we don’t consider them as necessary.
Of course, the boat is not particularly fast when you speed up but it allows a safe and fun navigation anyway, thanks to IPS transmission. The maximum speed is about 31 knots, while cheap cruising speed is 23 knots (105 l/h). Fast cruising speed is 27 knots and in this case the two Volvo Penta engines need 120 litres per hour, that is 4,5 l a mile.
Prestige 420 – Technical file
Project: J&J Design/Garroni Design/JP Concepts
Builder: Jeanneau, France www.jeanneau.com
Importer: www.jeanneau.it
CE category:Â B
Overall length:Â 12,64 m
Lenght:Â 11,32 m
Max Width:Â 3,97 m
Propeller Immersion 0,79 M
Displacement (empy boat): Â 9.516Â kg
Displacment (full load):Â 13.592Â kg
Max people: 9
Beds:: 6
Sea trial engines 2 x Volvo Penta IPS 400 Diesel
Power: HP 600
Transmission: IPS
Engines total weight:Â 1.802 kg
Fuel Tank:Â 800 l
Water Tank:Â 400 l
Optional engines: 2 x Volvo Penta IPS 500 (370 HP)
Materials and hull:Â fiberglass hull; fiberglass deck and superstructures; infusion layers; V-shape hull; 16-degree astern angle; two sustaining supports; static and dynamic corner
Optionals: Cruise control –  IPS joystick– cockpit engine controls – electric flaps – fore propeller –  Raymarine electronic pack – fore platform camera – AIS  mooring kit – anchoring kit – teak cockpit table – hydraulic gangway  – hydraulic astern plasform – tv – air conditioned – convertible dinette sofa – dishwasher
Basic Price: 341,200 Euros, Vat excluded, with 2×300 cv Volvo D4 IPS 400 engines.
Prestige 420 – Sea trial Performances
|
revolutions/min |
speed | litres/hour | litres/mile | autonomy |
| 600 | 4,0 | 2,0 | 0,5 | 1.600 |
| 1000 | 5,6 | 6,7 | 1,1 | 727 |
| 1500 | 8,6 | 18,0 | 2,1 | 380 |
| 2000 | 10,2 | 45,4 | 4,4 | 181 |
| 2500 | 14,7 | 74,1 | 5,2 | 153 |
| 3000 | 23,5 | 110 | 4,5 | 177 |
| 3500 | 31,0 | 140 | 4,5 | 177 |
Minimum gliding speed (flaps and/or trims at zero): 13.4 knots.
Sea trial conditions Wind: 15/18 knots; little rough sea. Liquid loads: 70%. People on board: 6
Sizes
Cockpit table: 60 x 103 cm
Astern linear sofa: 212 cm
Cockpit entrance width: 52 cm
Astern platform: 370×132 cm
Lateral channels length: 30 cm
Fore sunbathing platform: 173×168 cm
Dinette entrance width: 117 cm
Dinette height: 205 cm
Dinette Table: 120×70 cm
U-shape dinette sofa:Â 110x208x114 cm
Pilot seat: 68 cm
L-shaped kitchen: 133×76 cm
Entrance night zone widht: 68 cm
Fore cabin height: 191 cm
Berth:195×150 cm
Fore bathroom height: 193 cm
Astern cabin height: 186 cm
Berth: 200×173 cm
Fore bathroom height: 186 cm
