The Riviera 64 Sports Motor Yacht 2021 vs Riviera 645 SUV 2021 comparison sits squarely in the category of decisions where specs alone won't tell the whole story — intended use, storage, and long-term ownership costs all factor in.

On paper these two are close siblings in the size department — Riviera 64 Sports Motor Yacht 2021 at 69,8 ft versus Riviera 645 SUV 2021 at 69,8 ft. Weight tells a clearer story for trailering families: the Riviera 64 Sports Motor Yacht 2021 tips the scales at 94 755 lbs — 6 636 lbs more than the Riviera 645 SUV 2021 at 88 119 lbs. That difference is meaningful if you're working within a half-ton or three-quarter-ton truck's tow rating, especially once you factor in a motor, gear, and fuel.

Both boats share a closely matched power ceiling — 1 300 hp for the Riviera 64 Sports Motor Yacht 2021 and 1 300 hp for the Riviera 645 SUV 2021. Real-world performance will come down more to which motor is actually bolted on, its load at the time, and whether it's a 4-stroke or 2-stroke setup. Both carry nearly identical fuel loads — 1 717 gal and 1 717 gal — so range won't be a tiebreaker here.

Both boats are rated for 21 passengers — a good fit for a family of four or five plus guests. Comfort at capacity is another matter; the longer hull typically means more seat options and better weight distribution.