0–5 on published sub-scores
Kensun AC/DC Portable Air Compressor vs Ryobi P737D 18V ONE+ Cordless Inflator
Both units have been through the same bench protocol. Kensun AC/DC Portable Air Compressor takes 0 of the five sub-scores we publish, Ryobi P737D 18V ONE+ Cordless Inflator takes 5. The specs and the trade-offs below are what actually separate them.
This page compiles the hands-on testing we have already published in the individual reviews. It adds no new measurements: every score, spec and figure below comes from the linked review.
Kensun
Kensun AC/DC Portable Air Compressor
A capable dual-power inflator that covers both household and roadside duty. It is slower and less accurate than the Avid Power, but it costs less and the build is honest.
Ryobi
Ryobi P737D 18V ONE+ Cordless Inflator
If you already own Ryobi ONE+ batteries, this is the most convenient inflator you can buy: digital preset, no cables, and enough runtime for a full set of tires on one 4.0Ah pack.
Sub-scores from our reviews
The five dimensions behind every overall score on this site, taken verbatim from each review. A dash means the review does not publish that sub-score.
| Dimension | Kensun AC/DC Portable Air Compressor | Ryobi P737D 18V ONE+ Cordless Inflator |
|---|---|---|
| Inflation speed | 3.8 | 4.0 |
| Gauge accuracy | 3.6 | 4.8 |
| Build quality | 4.1 | 4.5 |
| Portability | 4.2 | 4.9 |
| Value | 4.3 | 4.5 |
| Overall score | 4.0 | 4.5 |
| Typical price | $49.99 | $49.00 (bare tool) |
Specifications both publish
| Spec | Kensun AC/DC Portable Air Compressor | Ryobi P737D 18V ONE+ Cordless Inflator |
|---|---|---|
| Maximum pressure | 150 PSI | 150 PSI |
| Air flow | 1.2 CFM at 0 PSI on AC, 1.1 CFM on DC | 0.57 CFM at 0 PSI |
| Power source | 120V AC wall power and 12V DC cigarette plug | Ryobi 18V ONE+ battery (bare tool, no battery included) |
| Hose length | 2.5 ft hose with 1 ft extension | 20 in high-pressure hose |
| Duty cycle | 10 minutes on, 10 minutes off | Continuous use, thermally protected |
| Weight | 4.1 lb (1.86 kg) | 3.6 lb (1.63 kg) with a 4.0Ah battery |
| Included adapters | Presta adapter, ball needle, nozzle adapter, carry bag | Presta adapter, sports needle, high-flow nozzle |
What you accept with each
Kensun AC/DC Portable Air Compressor
- Analog gauge read up to 3 PSI high, and drifted after four months
- Slower than the Avid Power in both power modes
- Housing gets noticeably hot around the cylinder after 6–7 minutes
- Short AC cord and a stiff hose below freezing
Ryobi P737D 18V ONE+ Cordless Inflator
- Sold as a bare tool — battery and charger cost extra if you are not already in the ONE+ system
- Slower than a battery-clamp 12V compressor on a completely flat tire
- Bulkier than a 12V inflator and heavier in the hand at 3.6 lb with a 4.0Ah pack
- The 1/4 in hose has no standard quick-release, so aftermarket accessories need an adapter
Which one, for whom
Choose the Kensun AC/DC Portable Air Compressor if you weight the trade-offs below more heavily.
Choose the Ryobi P737D 18V ONE+ Cordless Inflator if you weight inflation speed, gauge accuracy, build quality, portability, value more heavily, and the lower price ($49.00 (bare tool) against $49.99) matters.
Neither is a bad unit — both cleared the same protocol. Read the two full reviews before deciding: Kensun AC/DC Portable Air Compressor review and Ryobi P737D 18V ONE+ Cordless Inflator review.