ThunderJet Alexis Outboard - 21 ft. 2008 boat specs
ThunderJet
ThunderJet Alexis Outboard - 21 ft. 2008
2008
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VS
ThunderJet Denali 2011 boat specs
ThunderJet
ThunderJet Denali 2011
2011
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ThunderJet Alexis Outboard - 21 ft. 2008 vs ThunderJet Denali 2011 — A Close Look at Two Modified Vees

When two boats share the same hull type — in this case both the ThunderJet Alexis Outboard - 21 ft. 2008 and the ThunderJet Denali 2011 are modified vee designs with aluminum construction — the buying decision usually comes down to a handful of practical questions: how many people are you putting on the water, how far do you trailer, and what does your tow vehicle weigh?

For family outings this is probably the sharpest distinction between the two. The ThunderJet Alexis Outboard - 21 ft. 2008 is rated for 6 passengers, while the ThunderJet Denali 2011 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the ThunderJet Alexis Outboard - 21 ft. 2008 could be the deciding factor.

Bottom line: Choose the ThunderJet Alexis Outboard - 21 ft. 2008 if your priority is putting more people on the water — it handles 6 passengers and at 21,0 ft it has the deck room to back that rating up comfortably. The ThunderJet Denali 2011 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 5 that costs less to run day-to-day.
General Boat Info
MakeThunderJet
MakeThunderJet
ModelAlexis Outboard - 21 ft
ModelDenali
Model Year2008
Model Year2011
Measurements / Dimensions
Beam96 in
Beam90 in
Beam - Meters2.44
Beam - Meters2.29
Beam - Inches96
Beam - Inches9
Width [transom] - Detail34 in
Width [transom] - Detailnot available
Height - DetailSides: 34 in
Height - DetailSides: 25 in
Height - Meters0.86
Height - Meters0.64
Height - Inches34
Height - Inches25
Length - Feet21
Length - Feet18
Length overall - Detail21 ft. 0 in
Length overall - Detail18 ft
Length overall - Meters6.4
Length overall - Meters5.49
Length overall - Inches252
Length overall - Inches216
Deadrisenot available
Deadrise6°
Height [transom]not available
Height [transom]25 in
Body / Hull
Hull materialAluminum
Hull materialAluminum
Hull typeModified Vee
Hull typeModified Vee
Hull thicknessnot available
Hull thicknessSides: 0.125 in. Bottom: 0.190 in. Transom: 0.190 in
Engine and Drivetrain
Engine/s standardSuzuki
Engine/s standard200 hp Mercury Optimax Sport Jet
Fuel tank capacity - Detail50 gal
Fuel tank capacity - Detail48 gal
Fuel tank capacity - Liters189.27
Fuel tank capacity - Liters181.7
Fuel tank capacity - Gal5
Fuel tank capacity - Gal48
Fuel typeGas
Fuel typeGas
Drive typeOutboard
Drive typeJet Drive

ThunderJet Alexis Outboard - 21 ft. 2008 vs ThunderJet Denali 2011 — Common Questions

Which is the larger boat — the ThunderJet Alexis Outboard - 21 ft. 2008 or the ThunderJet Denali 2011?
The ThunderJet Alexis Outboard - 21 ft. 2008 is the longer of the two at 21,0 feet overall. The ThunderJet Denali 2011 comes in at 18,0 feet, making it roughly 3,0 ft shorter — a meaningful difference in deck room and overall on-water presence.
How many people can each boat hold?
The ThunderJet Alexis Outboard - 21 ft. 2008 is Coast Guard rated for 6 passengers, while the ThunderJet Denali 2011 is certified for 5. 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 ThunderJet Alexis Outboard - 21 ft. 2008 measures 96" wide, compared to 9" for the ThunderJet Denali 2011. 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 ThunderJet Alexis Outboard - 21 ft. 2008 or the ThunderJet Denali 2011?
The ThunderJet Denali 2011 has the bigger tank at 48 gallons, versus 5 gallons on the ThunderJet Alexis Outboard - 21 ft. 2008. That 43-gallon difference translates to roughly 129–215 nautical miles of additional range at cruising speed, depending on motor, load, and conditions.
Are the ThunderJet Alexis Outboard - 21 ft. 2008 and ThunderJet Denali 2011 from the same manufacturer?
Yes — both the ThunderJet Alexis Outboard - 21 ft. 2008 and the ThunderJet Denali 2011 are built by ThunderJet. 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.