Cordless Vacuums · Head-to-head
Dyson Gen5detect vs LG CordZero A925: Peak Suction vs Everyday Livability
On paper these two look like the same vacuum: sealed HEPA filtration, a pet tool, an anti-tangle brush, flagship ambitions. In practice they answer opposite questions. The Dyson Gen5detect chases peak suction and diagnostics at $950; the LG CordZero A925 chases all-day runtime and light weight at $400. Buyers cross-shop them when they want a do-everything cordless but haven't decided what "best" actually means for their home.
| Dyson Gen5detect | LG CordZero A925 | |
|---|---|---|
| Overall score | 6/10 | 7.7/10 |
| Suction | 9/10 | 7/10 |
| Runtime | 5/10 | 9/10 |
| Handling | 4/10 | 7/10 |
| Suction (advertised) | 280 AW | not published |
| Max runtime | 70 min | 120 min |
| Weight | 7.7 lb | 5.9 lb |
| Filtration | Sealed HEPA | Sealed HEPA |
| Dock | Freestanding / wall mount (no dock) | Charging dock |
| Typical price | $950 | $400 |
Suction: the numbers don't line up
Dyson publishes 280 air watts (AW). LG publishes no suction figure for the A925 at all, so there is no apples-to-apples number to line up, and there wouldn't be even if LG quoted one: air watts and kPa measure different things and don't convert between brands. What we can say is that our engine, testing both on the same rubric, scores the Dyson 9/10 for suction and the LG 7/10. Dyson has the raw-power edge; the LG is strong, not class-leading.
Runtime and weight: where the LG pulls ahead
Both advertised runtimes are best-case: eco mode with a non-motorized tool. On Boost with the powered brush, which is how you actually clean pet hair, expect a fraction of the number. That's true for both, but the LG starts from 120 minutes versus Dyson's 70, so its real-world cushion is far larger, and the engine scores it 9/10 to Dyson's 5. Weight compounds it: 5.9 lb versus 7.7 lb. Nearly two pounds decides stair and overhead fatigue, and handling scores reflect it, LG 7/10 to Dyson's 4/10.
Filtration ties, so dock and price decide
Filtration is a genuine wash: both seal HEPA-grade systems, so allergy buyers can pick on other grounds. The tiebreakers are the dock and the price. The LG ships with a charging dock, a fixed home base that keeps it topped up; the Dyson includes no dock, so you're finding a wall socket and a corner. Then there's the gap that frames everything: $400 versus $950. The Dyson is more than twice the price, and the engine's overall scores, LG 7.7 to Dyson's 6, reflect how much of that premium is peak suction alone.
Verdict
Buy the Dyson Gen5detect if raw suction and diagnostics are the whole point and budget isn't: a deep-cleaner for a carpet-heavy, dander-heavy home whose owner doesn't mind the weight or the price. Buy the LG CordZero A925 if you want the everyday-livable pick: lighter in the hand, far longer real runtime, a dock, at less than half the cost. The engine's higher overall score (7.7 vs 6) reflects that the LG fits most homes better, but the Dyson genuinely wins for the suction-first buyer.
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