Detailed Evaluation & Buyer Recommendation
ThunderJet Alexis - 21 ft. 2008 vs ThunderJet TJ Offshore 2011 — Same Brand, Different Boat
Matching a modified vee ThunderJet Alexis - 21 ft. 2008 against a deep vee ThunderJet TJ Offshore 2011 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 TJ Offshore 2011 has a 75-hp advantage over the ThunderJet Alexis - 21 ft. 2008's 425-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 2011 carries 16 gallons versus 5 gallons in the ThunderJet Alexis - 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 Alexis - 21 ft. 2008 is rated for 8 passengers, while the ThunderJet TJ Offshore 2011 caps at 7. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the ThunderJet Alexis - 21 ft. 2008 could be the deciding factor.
Bottom line: Choose the ThunderJet Alexis - 21 ft. 2008 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 ThunderJet TJ Offshore 2011 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 7 that costs less to run day-to-day.
General Boat Info
MakeThunderJet
MakeThunderJet
ModelAlexis - 21 ft
ModelTJ Offshore
Model Year2008
Model Year2011
Measurements / Dimensions
Beam - Meters2.44
Beam - Meters2.74
Beam - Inches96
Beam - Inches108
Width [transom] - Detail34 in
Width [transom] - Detailnot available
Height - DetailSides: 34 in
Height - DetailSides: 42 in
Height - Meters0.86
Height - Meters1.07
Height - Inches34
Height - Inches42
Length - Feet21
Length - Feet25
Length overall - Detail21 ft. 0 in
Length overall - Detail25 ft
Length overall - Meters6.4
Length overall - Meters7.62
Length overall - Inches252
Length overall - Inches3
Deadrisenot available
DeadriseStern: 18° Entry: 55° Overall: 27.5°
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]25 in
Body / Hull
Hull materialAluminum
Hull materialAluminum
Hull thickness0.190 in
Hull thicknessSides: 0.125 in. Bottom: 0.190 in. Transom: 0.190 in
Hull typeModified Vee
Hull typeDeep Vee
Engine and Drivetrain
Engine/s standardCarbureted Vortec 35
Engine/s standardnot available
Jet pumpAmerican Turbine SD 309
Jet pumpnot available
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
Fuel typeGas
Fuel typeGas or Diesel
Drive typeJet Drive
Drive typeOutboard
Engine max425 hp
Engine max500 hp
Max no of enginesnot available
Max no of engines2
Operational Info
Maximum capacity1,800 lbs
Maximum capacitynot available
Maximum people8 / 1,750 lbs
Maximum peoplenot available
Storagenot available
StorageFish Locker: 30 gal