The Riviera Yachts 45 Open Flybridge Shaft Drive 2012 vs Riviera Yachts 51 Enclosed Flybridge 2007 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 Yachts 45 Open Flybridge Shaft Drive 2012 at 51,3 ft versus Riviera Yachts 51 Enclosed Flybridge 2007 at 54,0 ft. Weight tells a clearer story for trailering families: the Riviera Yachts 51 Enclosed Flybridge 2007 tips the scales at 518 lbs — 124 lbs less than the Riviera Yachts 45 Open Flybridge Shaft Drive 2012 at 394 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.

The power gap is worth calling out. Rated to 1 400 hp, the Riviera Yachts 51 Enclosed Flybridge 2007 has a 730-hp advantage over the Riviera Yachts 45 Open Flybridge Shaft Drive 2012's 670-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Riviera Yachts 51 Enclosed Flybridge 2007 carries 713 gallons versus 608 gallons in the Riviera Yachts 45 Open Flybridge Shaft Drive 2012. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.

For family outings this is probably the sharpest distinction between the two. The Riviera Yachts 51 Enclosed Flybridge 2007 is rated for 16 passengers, while the Riviera Yachts 45 Open Flybridge Shaft Drive 2012 caps at 14. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Riviera Yachts 51 Enclosed Flybridge 2007 could be the deciding factor.