Dyson V16 Piston Animal vs Shark IP3251
Dyson V16 Piston Animal
The short answer
Shark IP3251 comes out ahead overall with 7.7/10 against 7.3/10 for the Dyson V16 Piston Animal. Dyson V16 Piston Animal is stronger on hair-tangle resistance and versatility & pet tools. Shark IP3251 is stronger on ease of use & maintenance, filtration, safety & repairability and value. At current verified prices, the Shark IP3251 costs about $435.00 less.
- Choose the Dyson V16 Piston Animal if: Big homes with heavy shedders that want Dyson's largest compacting bin and the longest max-power runtime, and can pay for it.
- Choose the Shark IP3251 if: Pet owners with mixed floors and rugs who want strong carpet pickup and an auto-empty dock so they never touch the debris.
Scores by criterion
| Criterion | Dyson V16 Piston Animal | Shark IP3251 |
|---|---|---|
| Pet hair pickup | 8.394% low / 56% high pile on the Submarine variant (same dry head) | 8.5Best high-pile result (74%) and 84% low pile in TechGearLab testing; RTINGS gives the IP1251 sibling 7.5 |
| Hair-tangle resistance | 8.0Zero wrap per TechGearLab, but Vacuum Wars scored 7 vs a 7.4 average | 6.0TechGearLab: hair and fur wrap around the rollers |
| Versatility & pet tools | 8.0Cones head, soft roller and motorized upholstery tool | 7.0MultiFlex wand, but the motorized pet tool costs extra and the bumper limits edge cleaning |
| Battery & runtime | 7.070 min low / 15-16 min max in independent tests | 7.047 min low / 12 min max in testing, detachable battery, slow 4.7 h charge |
| Ease of use & maintenance | 6.5Heavy (2,158 g handle per Vacuum Wars), offset by the 1.32 L compacting bin | 8.5Dock holds up to 45 days of debris; 3.9 lb handheld |
| Filtration, safety & repairability | 7.5Sealed HEPA passed Vacuum Wars' fog test; TechGearLab particle count 51; warranty not confirmed | 8.5Post-motor HEPA, 'Excellent' emissions per TechGearLab, 5-year warranty, no cordless recalls |
| Value | 5.0$785 from a marketplace seller | 7.5$549 from Amazon, dock included |
Specifications
| Spec | Dyson V16 Piston Animal | Shark IP3251 |
|---|---|---|
| Pet hair removed, low-pile carpet (TechGearLab test) | 94 % | 84 % |
| Pet hair removed, high-pile carpet (TechGearLab test) | 56 % | 74 % |
| Runtime at max power (TechGearLab) | 16 min | 12 min |
| Claimed max runtime (eco mode) | 70 min | 70 min |
| Swappable/click-in battery | Yes | Yes |
| Handheld unit weight (TechGearLab measured) | — | 3.9 lbs |
| Dustbin capacity | 1.32 L | 0.7 L |
| Claimed suction (max) | 315 AW | — |
| Anti-tangle/de-tangling floorhead (claimed) | Yes | Yes |
| Auto-empty dock included | No | Yes |
| HEPA filtration (manufacturer claim) | Yes | Yes |
| Manufacturer warranty | — | 5 years |
Dyson V16 Piston Animal
Pros
- 94% on low-pile pet hair
- Longest max-power runtime among the Dysons
- Largest compacting bin at 1.32 L
- Sealed HEPA system
- Removable battery
Cons
- Heavy
- 56% on high pile
- Premium price
- Mixed tangle results
A strong pick for big homes with heavy shedders and low-pile floors. The Amazon offer is from a marketplace seller, so check Dyson's own price before buying.
Full Dyson V16 Piston Animal review →Shark IP3251
Pros
- Best high-pile pet hair result in TechGearLab's test
- Auto-empty dock with HEPA filtration
- Detachable battery
- 5-year limited warranty
- Excellent emitted air quality in TechGearLab testing
Cons
- Hair and fur wrap around the rollers
- Front bumper limits head-on edge cleaning
- Motorized upholstery tool sold separately
- Charge time is about 4.7 hours
The best all-round choice for pet owners with mixed floors. It is not the lab leader on every test, but its carpet results, dock and warranty add up to the strongest overall package at a price well below the premium Dysons.
Full Shark IP3251 review →Both products are part of our guide The Best Cordless Stick Vacuums for Pet Hair of 2026, where you can see every pick, how we score and current prices from each retailer.