Torn between Car+Boat and BU3521UK for your next cordless vacuum?

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We examine the Car+Boat – a battery-power vacuum by Dyson, comparing runtime, dust tank, and costs, with – BU3521UK by Shark, analysing real-world vacuuming performance.
By assessing these vacuums – the Car+Boat and BU3521UK from DYSON and SHARK, you get the best floorcare machine.
Best Cordless Vacuum Pick
Best Buy: Shark PowerPro Cordless Stick Vacuum
Best cordless vacuum – Shark PowerPro – beating Car+Boat and BU3521UK on performance and value
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Get DealDYSON Car+Boat vs SHARK BU3521UK – key Specifications
DYSON Car+Boat Specs

- Product Brand: DYSON
- Cordless Vacuum Model: Car+Boat
- Type of Vacuum: Handheld
- Battery Life: 50 Minutes
- Dirt Tank Capacity: 0.54L
- Weight: 1.9KG
- Colour: Silver
- RRP: £249.00
SHARK BU3521UK Specs

- Product Brand: SHARK
- Cordless Vacuum Model: BU3521UK
- Type of Vacuum: Stick
- Battery Life: 40 Minutes
- Dirt Tank Capacity: 0.42L
- Weight: 2.7KG
- Colour: Navy Blue & White
- RRP: £349.99
Car+Boat and BU3521UK Cordless Battery Run Time
DYSON Handheld cordless vacuums, like the Car+Boat, provides lightweight portability without mains cables. BU3521UK Stick is also cordlessly powered by a SHARK rechargeable battery.
The Shark BU3521UK has a battery supply runtime of 40 minutes of cleaning, compared to the Dyson Car+Boat which has 50 minutes life.
- DYSON Car+Boat Runtime: 50 mins continuous vacuuming
- SHARK BU3521UK Runtime: 40 mins continuous vacuuming
Charging times between the Car+Boat and BU3521UK varies – check manual.
Cordless Vacuum Dust Tank Capacity
Both Dyson Car+Boat and Shark BU3521UK are bagless, storing dust, hairs, dirt, and debris inside a sealed 0.54 litre and 0.42 litre tank, respectively. The BU3521UK by SHARK holds up to 0.42 Litre of compressed dirty particles. The Car+Boat by DYSON has a capable capacity of 0.54 litre for manual disposable.
- Car+Boat onboard dirt/dust tank size: 0.54L
- BU3521UK onboard dirt/dust tank size: 0.42L
Floor Cleaning Types
Dyson’s Car+Boat and Shark’s BU3521UK brush heads are effective on every surface – carpets & deep-pile rugs, hard floors (laminate, wood, tiles), vinyl, even upholstery, and stairs.
Their only limitation is the BU3521UK and Car+Boat can’t vacuum liquids. For this, a SHARK or DYSON ‘wet and dry’ vacuum is needed.
Most Dyson and Shark battery powered vacuums include accessories. Check Car+Boat or BU3521UK manual for specifications and attachments.
Vacuum Filtration
The BU3521UK and DYSON Car+Boat include effective filters to capture dust, dander, pollen, hairs, and fibres.
DYSON and SHARK use HEPA, foam, or cloth, filters. Car+Boat and BU3521UK maintain suction and clean exhaust air.
SHARK and DYSON Reviews
Combined feedback from 39 reviewers shows the Car+Boat with a rating of 4.9/5 stars, and the BU3521UK vacuum gains a 4.4/5 average from 128 reviews, showing comparable reliability results.
| Brand | Model | Runtime | Weight | Tank | Best Price |
| DYSON | Car+Boat | 50 M | 1.9 | 0.54L | £249.00 |
| SHARK | BU3521UK | 40 M | 2.7 | 0.42L | £349.99 |
Best Buy: Shark PowerPro Cordless Stick Vacuum
Best cordless vacuum – Shark PowerPro – beating Car+Boat and BU3521UK on performance and value
Limited Offer
Get Deal