The Riviera 645 SUV is a unique motor yacht designed in collaboration with 4D designs. It features the largest water sports and fishing cockpit in Riviera's SUV Collection and a spectacular single-level living plan combining the alfresco deck with the spacious SUV saloon and galley. The accommodation deck offers a full-beam master stateroom and options for three or four staterooms with three bathrooms, plus an optional lower lounge, crew cabin, utility room, or additional accommodation.

The helm station seats three with expansive room, and the stand-up engine room is generously sized. Performance is powered by twin shaft drive MAN turbo diesel engines, which are the most powerful options in the SUV range. There are two interior design styles available: the Classic Edition and the Newport Edition, allowing personalized luxury and craftsmanship throughout the yacht.

Key exterior features include a hydraulic lifter boarding platform, a water sports and fishing cockpit with wet bar, BBQ, bait tank option, alfresco deck with teak flooring and lounges, bar with icemaker and entertainment system, rear glass bulkhead for combining alfresco and saloon space, and versatile foredeck options with seating and sunshade choices. Anchoring is made safe and convenient with a through-bow anchoring station with an Ultra anchor and washdown system. The yacht also offers easy deck movement with wide side decks and soft-blue LED courtesy lights.

Interior highlights encompass a gourmet galley with premium appliances and extensive storage, luxurious saloon with leather lounge and entertainment system, pantograph side door for direct side deck access, a cocktail wet bar, and multiple staterooms including a full-beam master suite with queen berth and chaise lounge, a VIP guest stateroom with ensuite, additional guest staterooms, and three stylish ensuites. Utility or crew cabin options with laundry facilities are also available.

Technology and performance are focused on blue-water capability with a smooth, dry ride, acoustic and thermal engine room insulation, powerful twin MAN V8 or optional V12 engines with joystick control, an intelligent power management system, remote system monitoring via the Siren Marine app, multiple entertainment areas, and easy service access. The yacht uses maintenance-free lithium-ion batteries and is backed by extensive warranties covering non-structural components, engine mechanical parts, and structural elements.