Head to head
Niftylift HR21 4x4 vs Skyjack SJ45 AJ+
The Niftylift HR21 4x4 is a self-propelled 4x4 articulated boom lift with 20.8m working height. The Skyjack SJ45 AJ+ is a diesel articulated boom lift with 13.72 m platform height.
Last reviewed 6 October 2026
Specifications side by side
| Niftylift HR21 4x4 | Skyjack SJ45 AJ+ | |
|---|---|---|
| Working outreach | 13m | 6.93 m |
| Weight | 6,680kg | 5,407 kg |
| Working height | 20.8m | - |
| Turning radius | 3.89m (outside) | - |
| Platform height | - | 13.72 m |
| Platform capacity | - | 300 kg |
Sources: Niftylift HR21 4x4, Skyjack SJ45 AJ+. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the HR21 4x4 if...
A larger rough-terrain articulated boom lift for taller external work such as cladding, steelwork, tree and utility access on uneven ground. The maker offers diesel only or hybrid power, and it lifts two people with their tools.
Full HR21 4x4 specifications →Buy or hire the SJ45 AJ+ if...
A rough-terrain articulated boom lift for external maintenance, cladding, signage and steelwork where a diesel machine with up-and-over reach is needed. It suits contractors working at mid height on uneven ground.
Full SJ45 AJ+ specifications →Common questions
What is the difference between the Niftylift HR21 4x4 and the Skyjack SJ45 AJ+?
The Niftylift HR21 4x4 is a self-propelled 4x4 articulated boom lift with 20.8m working height; the Skyjack SJ45 AJ+ is a diesel articulated boom lift with 13.72 m platform height.
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