The Challenger Grande 640 sleeps six on a twin axle, combining a French bed, a U-shaped dinette and a side washroom across 6

27 metres of internal length

At 2

46 metres wide, it has the space to make a six-berth layout work without feeling crowded

French Bed A fixed corner bed stays made up permanently, giving the adults a proper bedroom at the rear

U-Shaped Dinette A dedicated second seating area takes the pressure off the main lounge and converts to additional berths at night, which is what makes six berths practical rather than theoretical

Parallel Sofa Lounge Twin facing sofas at the front give the family a comfortable main living space, helped considerably by the Grande body width

Side Washroom Placing the washroom to the side keeps it within easy reach of both the bedroom and the dinette area

Full Kitchen Oven, microwave and fridge freezer cover family cooking and food storage properly

Twin Axle Two axles improve towing stability and load spread, which matters on a caravan of this size

Solar Panel and External Points Roof solar keeps the battery charged off grid, while an external BBQ point and 240v socket make outdoor cooking easy

GRP Side Panels Glass-reinforced plastic bodywork resists stone chips and hail, keeping maintenance minimal

For families of five or six wanting a fixed bed and two living areas, the Grande 640 is a well-resolved option