Riviera Yachts 4700 Sport Yacht 2008 boat specs
Riviera Yachts
Riviera Yachts 4700 Sport Yacht 2008
2008
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Riviera Yachts 51 Enclosed Flybridge SII 2012 boat specs
Riviera Yachts
Riviera Yachts 51 Enclosed Flybridge SII 2012
2012
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Riviera Yachts 4700 Sport Yacht 2008 vs Riviera Yachts 51 Enclosed Flybridge SII 2012 — Same Brand, Different Boat

Matching a modified vee Riviera Yachts 4700 Sport Yacht 2008 against a deep vee Riviera Yachts 51 Enclosed Flybridge SII 2012 means you're likely deciding between two genuinely different on-water experiences. Hull type shapes everything from ride quality and fuel burn to dock handling and resale trajectory.

Size is the most obvious dividing line here. The Riviera Yachts 51 Enclosed Flybridge SII 2012 measures 58,2 feet overall (2012), giving it roughly 53,2 additional feet of deck space compared to the Riviera Yachts 4700 Sport Yacht 2008 at 5,0 feet (2008). Weight tells a clearer story for trailering families: the Riviera Yachts 51 Enclosed Flybridge SII 2012 tips the scales at 4 806 lbs — 4 398 lbs less than the Riviera Yachts 4700 Sport Yacht 2008 at 408 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 1 150 hp, the Riviera Yachts 4700 Sport Yacht 2008 has a 435-hp advantage over the Riviera Yachts 51 Enclosed Flybridge SII 2012's 715-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 SII 2012 carries 978 gallons versus 634 gallons in the Riviera Yachts 4700 Sport Yacht 2008. 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 SII 2012 is rated for 16 passengers, while the Riviera Yachts 4700 Sport Yacht 2008 caps at 15. 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 SII 2012 could be the deciding factor.

Bottom line: Choose the Riviera Yachts 51 Enclosed Flybridge SII 2012 if your priority is putting more people on the water — it handles 16 passengers and at 58,2 ft it has the deck room to back that rating up comfortably. The Riviera Yachts 4700 Sport Yacht 2008 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 15 that costs less to run day-to-day.
General Boat Info
MakeRiviera Yachts
MakeRiviera Yachts
Model4700 Sport Yacht
Model51 Enclosed Flybridge SII
Model Year2008
Model Year2012
Measurements / Dimensions
Beam15 ft. 7 in. (4.76 m) including gunwale
Beam16 ft. 2 in. (4.93 m) including gunwale
Beam - Meters4.75
Beam - Meters4.93
Beam - Inches187
Beam - Inches194
Draft [max] - Detail4 ft. 1 in. (1.25 m) including props
Draft [max] - Detail4 ft. 6 in. (1.38 m) including props
Draft [max] - Meters1.24
Draft [max] - Meters1.37
Draft [max] - Inches49
Draft [max] - Inches54
Weight - Detail40,800 lbs. (18,500 kg)
Weight - Detail48,060 lbs. (21,800 kg)
Weight - kg18506.55
Weight - kg21799.63
Weight - lbs.408
Weight - lbs.4806
Length - Meters15.46
Length - Metersnot available
Length - Feet5
Length - Feet58.17
Length - Inches9
Length - Inchesnot available
Length [over all with swim platform]54 ft. 9 in. (16.69 m)
Length [over all with swim platform]58 ft. 2 in. (17.73 m)
Length overall - Detail50 ft. 9 in. (15.46 m)
Length overall - Detail54 ft. 8 in. (16.67 m)
Length overall - Meters15.47
Length overall - Meters16.66
Length overall - Inches609
Length overall - Inches656
Body / Hull
Hull materialFiberglass
Hull materialFiberglass
Hull typeModified Vee
Hull typeDeep Vee
Engine and Drivetrain
Engine/s standardx2 CATS 575 hp (423 kW) each
Engine/s standard(2) Catepillar
Fuel tank capacity - Detail634 gal. (2,400 l)
Fuel tank capacity - Detail978 gal. (3,700 l)
Fuel tank capacity - Liters2399.95
Fuel tank capacity - Liters3702.13
Fuel tank capacity - Gal634
Fuel tank capacity - Gal978
Fuel typeDiesel
Fuel typeDiesel
Drive typeInboard - Twin
Drive typeInboard - Twin
Engine max1,150 hp (846 kW)
Engine max715 hp (526 kW) each
Operational Info
HeadVacuFlush
Headnot available
Sleeping capacity6
Sleeping capacity6-8
Water capacity198 gal. (750 l)
Water capacity227 gal. (860 l)
Holding tank capacity - Detail40 gal. (151 l)
Holding tank capacity - Detail40 gal. (151 l)
Holding tank capacity - Liters151.42
Holding tank capacity - Liters151.42
Holding tank capacity - Gal4
Holding tank capacity - Gal4

Riviera Yachts 4700 Sport Yacht 2008 vs Riviera Yachts 51 Enclosed Flybridge SII 2012 — Common Questions

Which is the larger boat — the Riviera Yachts 4700 Sport Yacht 2008 or the Riviera Yachts 51 Enclosed Flybridge SII 2012?
The Riviera Yachts 51 Enclosed Flybridge SII 2012 is the longer of the two at 58,2 feet overall. The Riviera Yachts 4700 Sport Yacht 2008 comes in at 5,0 feet, making it roughly 53,2 ft shorter — a meaningful difference in deck room and overall on-water presence.
Which is easier to trailer — the Riviera Yachts 4700 Sport Yacht 2008 or the Riviera Yachts 51 Enclosed Flybridge SII 2012?
For trailering, the Riviera Yachts 4700 Sport Yacht 2008 has the edge at 408 lbs dry weight versus 4 806 lbs for the Riviera Yachts 51 Enclosed Flybridge SII 2012. Add a motor (typically 300–500 lbs for an outboard in this class), gear, and a partial fuel load and the difference grows. Lighter is friendlier on smaller tow vehicles and on fuel economy while hauling.
Which boat can handle a bigger outboard?
The Riviera Yachts 4700 Sport Yacht 2008 is rated to a maximum of 1 150 hp, giving it the larger power ceiling. The Riviera Yachts 51 Enclosed Flybridge SII 2012 tops out at 715 hp. Keep in mind that maximum ratings are just that — matching the motor to the actual load and usage pattern usually matters more than chasing the ceiling.
How many people can each boat hold?
The Riviera Yachts 4700 Sport Yacht 2008 is Coast Guard rated for 15 passengers, while the Riviera Yachts 51 Enclosed Flybridge SII 2012 is certified for 16. Note that legal capacity and comfortable capacity aren't always the same thing — on a full day out, most experienced boaters aim for about 80% of the rated number to keep things comfortable.
Which boat is wider, and does it affect trailering?
The Riviera Yachts 51 Enclosed Flybridge SII 2012 measures 194" wide, compared to 187" for the Riviera Yachts 4700 Sport Yacht 2008. The US standard-width towing limit is 8’6" (102") in most states — anything over that may need a wide-load permit. Confirm your specific route requirements with each state's DOT.
Which boat has the larger fuel tank — the Riviera Yachts 4700 Sport Yacht 2008 or the Riviera Yachts 51 Enclosed Flybridge SII 2012?
The Riviera Yachts 51 Enclosed Flybridge SII 2012 has the bigger tank at 978 gallons, versus 634 gallons on the Riviera Yachts 4700 Sport Yacht 2008. That 344-gallon difference translates to roughly 1032–1720 nautical miles of additional range at cruising speed, depending on motor, load, and conditions.
Are the Riviera Yachts 4700 Sport Yacht 2008 and Riviera Yachts 51 Enclosed Flybridge SII 2012 from the same manufacturer?
Yes — both the Riviera Yachts 4700 Sport Yacht 2008 and the Riviera Yachts 51 Enclosed Flybridge SII 2012 are built by Riviera Yachts. That means shared dealer networks, common parts availability, and consistent build quality across the line. The choice between them is essentially a question of how much boat you need, not which brand you trust.