ThunderJet Alexis Outboard - 21 ft. 2008 boat specs
ThunderJet
ThunderJet Alexis Outboard - 21 ft. 2008
2008
View full specs →
VS
ThunderJet Havasu 2008 boat specs
ThunderJet
ThunderJet Havasu 2008
2008
View full specs →

ThunderJet Alexis Outboard - 21 ft. 2008 vs ThunderJet Havasu 2008 — Which Modified Vee Fits Your Needs?

When two boats share the same hull type — in this case both the ThunderJet Alexis Outboard - 21 ft. 2008 and the ThunderJet Havasu 2008 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?

The ThunderJet Havasu 2008 tops out at 425 hp. Engine specs for the ThunderJet Alexis Outboard - 21 ft. 2008 aren't listed — confirm with a dealer before selecting an outboard.Both carry nearly identical fuel loads — 5 gal and 5 gal — so range won't be a tiebreaker here.

For family outings this is probably the sharpest distinction between the two. The ThunderJet Havasu 2008 is rated for 8 passengers, while the ThunderJet Alexis Outboard - 21 ft. 2008 caps at 6. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the ThunderJet Havasu 2008 could be the deciding factor.

Bottom line: Choose the ThunderJet Havasu 2008 if your priority is putting more people on the water — it handles 8 passengers and at 2,0 ft it has the deck room to back that rating up comfortably. The ThunderJet Alexis Outboard - 21 ft. 2008 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
MakeThunderJet
MakeThunderJet
ModelAlexis Outboard - 21 ft
ModelHavasu
Model Year2008
Model Year2008
Measurements / Dimensions
Beam96 in
Beam90 in
Beam - Meters2.44
Beam - Meters2.29
Beam - Inches96
Beam - Inches9
Width [transom] - Detail34 in
Width [transom] - Detail31 in
Height - DetailSides: 34 in
Height - DetailSides: 31 in
Height - Meters0.86
Height - Meters0.79
Height - Inches34
Height - Inches31
Length - Feet21
Length - Feet2
Length overall - Detail21 ft. 0 in
Length overall - Detail20 ft. 0 in
Length overall - Meters6.4
Length overall - Meters6.1
Length overall - Inches252
Length overall - Inches24
Deadrisenot available
Deadrise14℃
Body / Hull
Hull materialAluminum
Hull materialAluminum
Hull typeModified Vee
Hull typeModified Vee
Hull thicknessnot available
Hull thickness0.190 in
Engine and Drivetrain
Engine/s standardSuzuki
Engine/s standard350 Carbureted; 250 hp
Fuel tank capacity - Detail50 gal
Fuel tank capacity - Detail50 gal
Fuel tank capacity - Liters189.27
Fuel tank capacity - Liters189.27
Fuel tank capacity - Gal5
Fuel tank capacity - Gal5
Fuel typeGas
Fuel typeGas
Drive typeOutboard
Drive typeJet Drive
Jet pumpnot available
Jet pumpAmerican Turbine SD 309
Engine maxnot available
Engine max425 hp
Operational Info
Maximum capacitynot available
Maximum capacity1,800 lbs
Maximum peoplenot available
Maximum people8 / 1,750 lbs

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

Which is the larger boat — the ThunderJet Alexis Outboard - 21 ft. 2008 or the ThunderJet Havasu 2008?
The ThunderJet Alexis Outboard - 21 ft. 2008 is the longer of the two at 21,0 feet overall. The ThunderJet Havasu 2008 comes in at 2,0 feet, making it roughly 19,0 ft shorter — a meaningful difference in deck room and overall on-water presence.
What is the maximum horsepower rating for these boats?
The ThunderJet Havasu 2008 has a documented max rating of 425 hp. Engine specifications for the ThunderJet Alexis Outboard - 21 ft. 2008 were not available in our database — check the OEM spec sheet or manufacturer's website for confirmation.
How many people can each boat hold?
The ThunderJet Alexis Outboard - 21 ft. 2008 is Coast Guard rated for 6 passengers, while the ThunderJet Havasu 2008 is certified for 8. 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 Havasu 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.
How do the fuel tanks compare on the ThunderJet Alexis Outboard - 21 ft. 2008 and ThunderJet Havasu 2008?
Both boats carry similar fuel loads — 5 gallons and 5 gallons respectively. Range will depend heavily on motor choice, throttle usage, and whether you're on flat lake water or coastal chop.
Are the ThunderJet Alexis Outboard - 21 ft. 2008 and ThunderJet Havasu 2008 from the same manufacturer?
Yes — both the ThunderJet Alexis Outboard - 21 ft. 2008 and the ThunderJet Havasu 2008 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.