Detailed Evaluation & Buyer Recommendation
ThunderJet Alexis OB Offshore - 21 ft. 2008 vs ThunderJet TJ Offshore 2012 — Same Brand, Different Boat
Matching a modified vee ThunderJet Alexis OB Offshore - 21 ft. 2008 against a deep vee ThunderJet TJ 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 150-hp advantage over the ThunderJet TJ Offshore 2012's 350-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 TJ Offshore 2012 carries 16 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.
For family outings this is probably the sharpest distinction between the two. The ThunderJet TJ Offshore 2012 is rated for 7 passengers, while the ThunderJet Alexis OB Offshore - 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 TJ Offshore 2012 could be the deciding factor.
Bottom line: Choose the ThunderJet TJ Offshore 2012 if your priority is putting more people on the water — it handles 7 passengers and at 26,0 ft it has the deck room to back that rating up comfortably. The ThunderJet Alexis OB Offshore - 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 OB Offshore - 21 ft
ModelTJ Offshore
Model Year2008
Model Year2012
Measurements / Dimensions
Beam - Meters2.59
Beam - Meters2.74
Beam - Inches102
Beam - Inches108
Width [transom] - Detail40 in
Width [transom] - DetailBottom: 90 in
Height - DetailSides: 40 in
Height - DetailSides: 42 in
Height - Meters1.02
Height - Meters1.07
Height - Inches4
Height - Inches42
Length - Feet21
Length - Feet26
Length overall - Detail21 ft. 0 in
Length overall - Detail26 ft
Length overall - Meters6.4
Length overall - Meters7.92
Length overall - Inches252
Length overall - Inches312
Deadrisenot available
DeadriseStern: 18° Bow: 55°
Weight - Detailnot available
Weight - Detail4,800 lbs
Weight - kgnot available
Weight - kg2177.24
Weight - lbs.not available
Weight - lbs.48
Height [transom]not available
Height [transom]42 in
Body / Hull
Hull materialAluminum
Hull materialAluminum
Hull thickness0.190 in
Hull thicknessSides: 0.16 in. Bottom: 0.25 in. Transom: 0.25 in
Hull typeModified Vee
Hull typeDeep Vee
Engine and Drivetrain
Fuel tank capacity - Detail50 gal
Fuel tank capacity - Detail160 gal
Fuel tank capacity - Liters189.27
Fuel tank capacity - Liters605.67
Fuel tank capacity - Gal5
Fuel tank capacity - Gal16
Drive typeOutboard
Drive typeOutboard
Engine max500 hp
Engine max350 hp