The Riviera Yachts 47 Enclosed Flybridge SII 2008 vs Riviera Yachts 51 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.

Size is the most obvious dividing line here. The Riviera Yachts 51 Flybridge 2007 measures 54,0 feet overall (2007), giving it roughly 5,0 additional feet of deck space compared to the Riviera Yachts 47 Enclosed Flybridge SII 2008 at 49,0 feet (2008). At 432 lbs and 452 lbs respectively, both sit in a similar weight class — either should pair comfortably with most mid-size SUVs and half-ton trucks, though always confirm your specific tow rating with the motor added.

The power gap is worth calling out. Rated to 1 650 hp, the Riviera Yachts 47 Enclosed Flybridge SII 2008 has a 250-hp advantage over the Riviera Yachts 51 Flybridge 2007's 1 400-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Both carry nearly identical fuel loads — 713 gal and 713 gal — so range won't be a tiebreaker here.

For family outings this is probably the sharpest distinction between the two. The Riviera Yachts 51 Flybridge 2007 is rated for 16 passengers, while the Riviera Yachts 47 Enclosed Flybridge SII 2008 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 Flybridge 2007 could be the deciding factor.