Detailed Evaluation & Buyer Recommendation
Thunder Jet 21 Chinook OS 2021 vs ThunderJet Bull Dog 20 ft. 2013 — Same Brand, Different Boat
The Thunder Jet 21 Chinook OS 2021 vs ThunderJet Bull Dog 20 ft. 2013 comparison sits squarely in the category of decisions where specs alone won't tell the whole story — intended use, storage, and long-term ownership costs all factor in.
The ThunderJet Bull Dog 20 ft. 2013 tops out at 320 hp. Engine specs for the Thunder Jet 21 Chinook OS 2021 aren't listed — confirm with a dealer before selecting an outboard.Both carry nearly identical fuel loads — 45 gal and 48 gal — so range won't be a tiebreaker here.
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: The Thunder Jet 21 Chinook OS 2021 at 21,0 ft is the right call if deck space, comfort, and entertaining are top of your list. The ThunderJet Bull Dog 20 ft. 2013 at 2,0 ft wins on trailering ease, likely lower purchase price, and simpler docking — a solid choice for a buyer who wants more boat for less money.
Measurements / Dimensions
Length overall - Detail21.00 ft
Length overall - Detail20 ft
Length - Feet21
Length - Feet2
Length overall - Meters6.4
Length overall - Meters6.1
Length overall - Inches252
Length overall - Inches24
Beamnot available
Beam96 in
Beam - Metersnot available
Beam - Meters2.44
Beam - Inchesnot available
Beam - Inches96
Deadrisenot available
Deadrise8°
Weight - Detailnot available
Weight - Detail3,300 lbs
Weight - kgnot available
Weight - kg1496.85
Weight - lbs.not available
Weight - lbs.33
Width [transom] - Detailnot available
Width [transom] - DetailBottom: 72 in
Height - Detailnot available
Height - DetailSides: 35 in
Height - Metersnot available
Height - Meters0.89
Height - Inchesnot available
Height - Inches35
Height [transom]not available
Height [transom]35 in
Engine and Drivetrain
Fuel tank capacity - Gal45
Fuel tank capacity - Gal48
Fuel tank capacity - Liters170.34
Fuel tank capacity - Liters181.7
Engine makenot available
Engine makeGM
Engine modelnot available
Engine model350 cid multi-port fuel injected Vortec
Exhaustnot available
ExhaustCatalyzed exhaust with KLS mufflers and intake water strainer (sand trap)
Impellernot available
ImpellerTurbo
Jet pumpnot available
Jet pumpHamilton Jet 212 axial flow with JT nozzle, split duct reverse and close coupling
Fuel tank capacity - Detailnot available
Fuel tank capacity - Detail48 gal
Fuel typenot available
Fuel typeGas
Drive typenot available
Drive typeJet Drive
Horsepowernot available
Horsepower320 hp
Operational Info
Boat typePower
Boat typenot available
General Boat Info
Makenot available
MakeThunderJet
Modelnot available
ModelBull Dog 20 ft
Model Yearnot available
Model Year2013
Body / Hull
Hull materialnot available
Hull materialAluminum
Hull thicknessnot available
Hull thicknessSides: 0.125 in. Bottom: 0.375 in. Transom: 0.25 in
Hull typenot available
Hull typeModified Vee
Trailer Info
Trailer - Detailnot available
Trailer - DetailGateway 5,200 lb. capacity galvanized tandem axle bunk