Detailed Evaluation & Buyer Recommendation
Sea Fox 180 Viper 2013 vs Sea Fox 21 BF Sport 2007 — Same Brand, Different Boat
Matching a deep vee Sea Fox 180 Viper 2013 against a modified vee Sea Fox 21 BF Sport 2007 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.
On paper these two are close siblings in the size department — Sea Fox 180 Viper 2013 at 18,1 ft versus Sea Fox 21 BF Sport 2007 at 21,0 ft. At 25 lbs and 21 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 200 hp, the Sea Fox 21 BF Sport 2007 has a 85-hp advantage over the Sea Fox 180 Viper 2013's 115-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Sea Fox 21 BF Sport 2007 carries 47 gallons versus 4 gallons in the Sea Fox 180 Viper 2013. 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 Sea Fox 21 BF Sport 2007 is rated for 8 passengers, while the Sea Fox 180 Viper 2013 caps at 6. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Sea Fox 21 BF Sport 2007 could be the deciding factor.
Bottom line: Choose the Sea Fox 21 BF Sport 2007 if your priority is putting more people on the water — it handles 8 passengers and at 21,0 ft it has the deck room to back that rating up comfortably. The Sea Fox 180 Viper 2013 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 6 that costs less to run day-to-day.
General Boat Info
Model180 Viper
Model21 BF Sport
Model Year2013
Model Year2007
Measurements / Dimensions
Beam8 ft. (2.4 m)
Beam7 ft. 10 in. (2.4 m)
Beam - Meters2.44
Beam - Meters2.39
Beam - Inches96
Beam - Inches94
Bridge clearance - Detail7 ft. 10 in. (2.3 m)
Bridge clearance - Detailnot available
Bridge clearance - Meters2.39
Bridge clearance - Metersnot available
Bridge clearance - Inches94
Bridge clearance - Inchesnot available
Deadrise15°
Deadrise16℃
Draft [max] - Detail13 in. (0.33 m)
Draft [max] - Detail10 in
Draft [max] - Meters0.33
Draft [max] - Meters0.25
Draft [max] - Inches13
Draft [max] - Inches1
Weight - DetailDry Weight: 1,700 lbs. (771 kg) Maximum Weight: 2,500 lbs. (1,133 kg)
Weight - Detail2,100 lbs. (953 kg)
Weight - kg1133.98
Weight - kg952.54
Weight - lbs.25
Weight - lbs.21
Height [transom]25 in. (0.63 m)
Height [transom]25 in
Length - Feet18.08
Length - Feet21
Length overall - Detail18 ft. 1 in. (5.5 m)
Length overall - Detail21 ft. 7 in. (5.8 m)
Length overall - Meters5.51
Length overall - Meters6.58
Length overall - Inches217
Length overall - Inches259
Length - Metersnot available
Length - Meters5.8
Length - Inchesnot available
Length - Inches7
Body / Hull
Hull materialFiberglass
Hull materialFiberglass
Hull typeDeep Vee
Hull typeModified Vee
Engine and Drivetrain
Fuel tank capacity - Detail40 gal. (151 l)
Fuel tank capacity - Detail47 gal. (178 l)
Fuel tank capacity - Liters151.42
Fuel tank capacity - Liters177.91
Fuel tank capacity - Gal4
Fuel tank capacity - Gal47
Drive typeOutboard
Drive typeOutboard
Engine max115 hp (85 kW)
Engine max200 hp (149 kW)
Operational Info
Maximum capacity1,500 lbs. (680 kg)
Maximum capacity1,200 lbs. (544 kg)
Maximum people6
Maximum people8