Nitro NX 750 SC  2005 boat specs
Nitro
Nitro NX 750 SC 2005
2005
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VS
Nitro Z21 2021 boat specs
Nitro
Nitro Z21 2021
2021
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Nitro NX 750 SC 2005 vs Nitro Z21 2021 — Same Brand, Different Boat

The Nitro NX 750 SC 2005 vs Nitro Z21 2021 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 Nitro NX 750 SC 2005 carries a rated maximum of 135 hp. Engine data for the Nitro Z21 2021 wasn't available in our records — check the manufacturer's spec sheet before sizing a motor.Fuel capacity breaks the other way: the Nitro Z21 2021 carries 55 gallons versus 3 gallons in the Nitro NX 750 SC 2005. 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 Nitro Z21 2021 is rated for 6 passengers, while the Nitro NX 750 SC 2005 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Nitro Z21 2021 could be the deciding factor.

Bottom line: Choose the Nitro Z21 2021 if your priority is putting more people on the water — it handles 6 passengers and at 21,0 ft it has the deck room to back that rating up comfortably. The Nitro NX 750 SC 2005 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
MakeNitro
Makenot available
ModelNX 750 SC
Modelnot available
Model Year2005
Model Yearnot available
Measurements / Dimensions
Beam86 in
Beamnot available
Beam - Meters2.18
Beam - Metersnot available
Beam - Inches86
Beam - Inchesnot available
Weight - Detail1,350 lbs
Weight - Detailnot available
Weight - kg612.35
Weight - kgnot available
Weight - lbs.135
Weight - lbs.not available
Height [transom]22 in
Height [transom]not available
Length - Feet17
Length - Feet21
Length - Inches6
Length - Inchesnot available
Length overall - Detail17 ft. 6 in
Length overall - Detail21.00 ft
Length overall - Meters5.33
Length overall - Meters6.4
Length overall - Inches21
Length overall - Inches252
Draft Minnot available
Draft Min1.33 ft
Engine and Drivetrain
Fuel tank capacity - Detail30 gal
Fuel tank capacity - Detailnot available
Fuel tank capacity - Liters113.56
Fuel tank capacity - Liters208.2
Fuel tank capacity - Gal3
Fuel tank capacity - Gal55
Engine max135 hp
Engine maxnot available
Fuel typenot available
Fuel typeGas
Drive typenot available
Drive typeoutboard
Operational Info
Maximum capacity1,325 lbs
Maximum capacitynot available
Maximum people5
Maximum peoplenot available
Boat typenot available
Boat typePower
Trailer Info
Trailer - Length over all23 ft. 6 in. (with Transom Saver) 22 ft. 6 in. (without Transom Saver)
Trailer - Length over allnot available
Trailer - Weight2,295 lbs
Trailer - Weightnot available
Trailer - Width8 ft. 3 in
Trailer - Widthnot available

Nitro NX 750 SC 2005 vs Nitro Z21 2021 — Common Questions

Which is the larger boat — the Nitro NX 750 SC 2005 or the Nitro Z21 2021?
The Nitro Z21 2021 is the longer of the two at 21,0 feet overall. The Nitro NX 750 SC 2005 comes in at 17,0 feet, making it roughly 4,0 ft shorter — a meaningful difference in deck room and overall on-water presence.
What is the maximum horsepower rating for these boats?
The Nitro NX 750 SC 2005 has a documented max rating of 135 hp. Engine specifications for the Nitro Z21 2021 were not available in our database — check the OEM spec sheet or manufacturer's website for confirmation.
How many people can each boat hold?
The Nitro NX 750 SC 2005 is Coast Guard rated for 5 passengers, while the Nitro Z21 2021 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.
Which boat has the larger fuel tank — the Nitro NX 750 SC 2005 or the Nitro Z21 2021?
The Nitro Z21 2021 has the bigger tank at 55 gallons, versus 3 gallons on the Nitro NX 750 SC 2005. That 52-gallon difference translates to roughly 156–260 nautical miles of additional range at cruising speed, depending on motor, load, and conditions.
Are the Nitro NX 750 SC 2005 and Nitro Z21 2021 from the same manufacturer?
Yes — both the Nitro NX 750 SC 2005 and the Nitro Z21 2021 are built by Nitro. 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.