Detailed Evaluation & Buyer Recommendation
ThunderJet Alexis - 21 ft. 2008 vs ThunderJet Denali 2013 — A Close Look at Two Modified Vees
When two boats share the same hull type — in this case both the ThunderJet Alexis - 21 ft. 2008 and the ThunderJet Denali 2013 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 Alexis - 21 ft. 2008 carries a rated maximum of 425 hp. Engine data for the ThunderJet Denali 2013 wasn't available in our records — check the manufacturer's spec sheet before sizing a motor.Fuel capacity breaks the other way: the ThunderJet Denali 2013 carries 48 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 Denali 2013 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 - 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 Denali 2013 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 - 21 ft
ModelDenali
Model Year2008
Model Year2013
Measurements / Dimensions
Beam - Meters2.44
Beam - Meters2.29
Beam - Inches96
Beam - Inches9
Width [transom] - Detail34 in
Width [transom] - DetailBottom: 78 in
Height - DetailSides: 34 in
Height - DetailSides: 28 in
Height - Meters0.86
Height - Meters0.71
Height - Inches34
Height - Inches28
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°
Weight - Detailnot available
Weight - Detail1,900 lbs
Weight - kgnot available
Weight - kg861.82
Weight - lbs.not available
Weight - lbs.19
Height [transom]not available
Height [transom]28 in
Body / Hull
Hull materialAluminum
Hull materialAluminum
Hull thickness0.190 in
Hull thicknessSides: 0.125 in. Bottom: 0.19 in. Transom: 0.19 in
Hull typeModified Vee
Hull typeModified Vee
Engine and Drivetrain
Engine/s standardCarbureted Vortec 35
Engine/s standardnot available
Jet pumpAmerican Turbine SD 309
Jet pumpMixed flow high volume
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
Drive typeJet Drive
Drive typeJet Drive
Engine max425 hp
Engine maxnot available
Engine makenot available
Engine makeMercury
Engine modelnot available
Engine model200 Optimax Sport Jet 60° direct fuel injected V-6
Exhaustnot available
ExhaustTuned thru transom exhaust with dual mufflers
Impellernot available
Impeller4-blade progressive pitch SST
Operational Info
Maximum capacity1,800 lbs
Maximum capacitynot available
Maximum people8 / 1,750 lbs
Maximum peoplenot available
Trailer Info
Trailer - Detailnot available
Trailer - DetailGateway 3,980 lb. capacity galvanized single axle bunk