ThunderJet Alexis OB Offshore - 21 ft. 2008 vs ThunderJet Alexis Offshore 2012 - Boat Spec Comparison

Q: Which is the larger boat — the ThunderJet Alexis OB Offshore - 21 ft. 2008 or the ThunderJet Alexis Offshore 2012?

The ThunderJet Alexis Offshore 2012 is the longer of the two at 22,0 feet overall. The ThunderJet Alexis OB Offshore - 21 ft. 2008 comes in at 21,0 feet, making it roughly 1,0 ft shorter — a meaningful difference in deck room and overall on-water presence.

Q: Which boat can handle a bigger outboard?

The ThunderJet Alexis OB Offshore - 21 ft. 2008 is rated to a maximum of 500 hp, giving it the larger power ceiling. The ThunderJet Alexis Offshore 2012 tops out at 300 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.

Q: How many people can each boat hold?

The ThunderJet Alexis OB Offshore - 21 ft. 2008 is Coast Guard rated for 6 passengers, while the ThunderJet Alexis Offshore 2012 is certified for 6. 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.

Q: Do these boats require an oversize trailer permit to tow on US highways?

Both the ThunderJet Alexis OB Offshore - 21 ft. 2008 and ThunderJet Alexis Offshore 2012 share an 102 in beam — meaning both sit right at the 8’6" threshold that most US states use for standard-width loads. In most states you can tow at that width without a special permit, but regulations vary. Always check the rules for your state and any states you'll be passing through before your first long haul.

Q: Which boat has the larger fuel tank — the ThunderJet Alexis OB Offshore - 21 ft. 2008 or the ThunderJet Alexis Offshore 2012?

The ThunderJet Alexis Offshore 2012 has the bigger tank at 48 gallons, versus 5 gallons on the ThunderJet Alexis OB Offshore - 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.

Q: Are the ThunderJet Alexis OB Offshore - 21 ft. 2008 and ThunderJet Alexis Offshore 2012 from the same manufacturer?

Yes — both the ThunderJet Alexis OB Offshore - 21 ft. 2008 and the ThunderJet Alexis Offshore 2012 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.

Boat Comparison

ThunderJet Alexis OB Offshore - 21 ft. 2008 vs ThunderJet Alexis Offshore 2012

ThunderJet

ThunderJet Alexis OB Offshore - 21 ft. 2008

2008

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ThunderJet

ThunderJet Alexis Offshore 2012

2012

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Detailed Evaluation & Buyer Recommendation

ThunderJet Alexis OB Offshore - 21 ft. 2008 vs ThunderJet Alexis Offshore 2012 — Same Brand, Different Boat

Matching a modified vee ThunderJet Alexis OB Offshore - 21 ft. 2008 against a deep vee ThunderJet Alexis Offshore 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.

The power gap is worth calling out. Rated to 500 hp, the ThunderJet Alexis OB Offshore - 21 ft. 2008 has a 200-hp advantage over the ThunderJet Alexis Offshore 2012's 300-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the ThunderJet Alexis Offshore 2012 carries 48 gallons versus 5 gallons in the ThunderJet Alexis OB Offshore - 21 ft. 2008. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.

Both boats are rated for 6 passengers — a good fit for a family of four or five plus guests. Comfort at capacity is another matter; the longer hull typically means more seat options and better weight distribution.

Bottom line: Performance buyers should lean toward the ThunderJet Alexis OB Offshore - 21 ft. 2008 and its 500-hp ceiling. If fuel economy and quieter running matter more than top-end speed, the ThunderJet Alexis Offshore 2012 with its 300-hp rating is the more economical daily driver.

General Boat Info

MakeThunderJet

ModelAlexis OB Offshore - 21 ft

ModelAlexis Offshore

Model Year2008

Model Year2012

Measurements / Dimensions

Beam102 in

Beam - Meters2.59

Beam - Inches102

Width [transom] - Detail40 in

Width [transom] - DetailBottom: 84 in

Height - DetailSides: 40 in

Height - Meters1.02

Height - Inches4

Length - Feet21

Length - Feet22

Length overall - Detail21 ft. 0 in

Length overall - Detail22 ft

Length overall - Meters6.4

Length overall - Meters6.71

Length overall - Inches252

Length overall - Inches264

Deadrisenot available

Deadrise18&#176

Weight - Detailnot available

Weight - Detail2,500 lbs. With 1/2 Hard Top: 2,950 lbs. With Full Hard Top: 3,100 lbs

Weight - kgnot available

Weight - kg1406.14

Weight - lbs.not available

Weight - lbs.31

Height [transom]not available

Height [transom]40 in

Body / Hull

Hull materialAluminum

Hull thickness0.190 in

Hull thicknessSide: 0.125 in. Bottom: 0.190 in. Transom: 0.250 in

Hull typeModified Vee

Hull typeDeep Vee

Engine and Drivetrain

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

Drive typeOutboard

Engine max500 hp

Engine max300 hp

Trailer Info

Trailer - Detailnot available

Trailer - DetailGateway 5,200 lbs. capacity galvanized tandem axle bunk trailer

ThunderJet Alexis OB Offshore - 21 ft. 2008 vs ThunderJet Alexis Offshore 2012 — Common Questions

Which is the larger boat — the ThunderJet Alexis OB Offshore - 21 ft. 2008 or the ThunderJet Alexis Offshore 2012?

The ThunderJet Alexis Offshore 2012 is the longer of the two at 22,0 feet overall. The ThunderJet Alexis OB Offshore - 21 ft. 2008 comes in at 21,0 feet, making it roughly 1,0 ft shorter — a meaningful difference in deck room and overall on-water presence.

Which boat can handle a bigger outboard?

The ThunderJet Alexis OB Offshore - 21 ft. 2008 is rated to a maximum of 500 hp, giving it the larger power ceiling. The ThunderJet Alexis Offshore 2012 tops out at 300 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 ThunderJet Alexis OB Offshore - 21 ft. 2008 is Coast Guard rated for 6 passengers, while the ThunderJet Alexis Offshore 2012 is certified for 6. 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.

Do these boats require an oversize trailer permit to tow on US highways?

Both the ThunderJet Alexis OB Offshore - 21 ft. 2008 and ThunderJet Alexis Offshore 2012 share an 102 in beam — meaning both sit right at the 8’6" threshold that most US states use for standard-width loads. In most states you can tow at that width without a special permit, but regulations vary. Always check the rules for your state and any states you'll be passing through before your first long haul.

Which boat has the larger fuel tank — the ThunderJet Alexis OB Offshore - 21 ft. 2008 or the ThunderJet Alexis Offshore 2012?

The ThunderJet Alexis Offshore 2012 has the bigger tank at 48 gallons, versus 5 gallons on the ThunderJet Alexis OB Offshore - 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 OB Offshore - 21 ft. 2008 and ThunderJet Alexis Offshore 2012 from the same manufacturer?

Yes — both the ThunderJet Alexis OB Offshore - 21 ft. 2008 and the ThunderJet Alexis Offshore 2012 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.

← ThunderJet Alexis OB Offshore - 21 ft. 2008 full specs ← ThunderJet Alexis Offshore 2012 full specs