Best Robot Vacuums Under £400 in the UK: Roomba, Roborock and Eufy Compared

Discover the top robot vacuums under £400 in the UK from Roomba, Roborock and Eufy. We compare real prices, features and expert reviews to help you choose the best for your home.

What to Look for in a Robot Vacuum Under £400

When selecting a robot vacuum under £400, prioritise suction power, battery life, navigation technology and app control. Suction measured in Pascals (Pa) should exceed 2000Pa for effective cleaning on carpets and hard floors. Battery life of at least 90 minutes ensures coverage of medium-sized rooms, with recharge times under six hours ideal.

Navigation and obstacle avoidance are crucial; LiDAR or camera-based systems map rooms efficiently, avoiding furniture and pet messes. Mopping capability adds value for mixed flooring, but check water tank size (at least 200ml). Self-emptying docks are rare under £400, so manual bin emptying is common.

App features like scheduling, no-go zones and cleaning reports enhance usability. Dustbin capacity over 400ml reduces emptying frequency. For UK buyers, verify Alexa or Google Home compatibility and availability from retailers like Amazon or brand sites. Noise levels below 65dB suit quiet homes.

Pet hair performance and edge cleaning matter for everyday use. Expert tests from Good Housekeeping and Which? emphasise crumb pick-up and carpet dust removal.

Top Picks

Best Overall: [Solenco Hobot Legee-D8](https://www.amazon.co.uk/s?k=Solenco+Hobot+Legee-D8&tag=buybrighter-21) (£349)

This vacuum-mop combo excels in affordability and performance. It vacuums and mops simultaneously with a 349ml water tank and strong crumb clearance on hard floors. Quick recharge under four hours and compact design suit small UK homes.

Best for Mopping: [Hoover HG4 Hydro Pro](https://www.amazon.co.uk/s?k=Hoover+HG4+Hydro+Pro&tag=buybrighter-21) (£299)

Priced at £299 on Amazon, it offers dual vacuum-mop function with excellent ketchup smear removal in two passes. 150-minute runtime and discreet dock fit tight spaces, though it needs bagged waste.

Best Budget Eufy: [Eufy RoboVac G30 Hybrid](https://www.amazon.co.uk/s?k=Eufy+RoboVac+G30+Hybrid&tag=buybrighter-21) (£269)

At £269 from Amazon or Eufy, it provides 2000Pa suction, 110-minute runtime and mop function. Hybrid cleaning tackles mixed floors, with app control via Eufy Clean.

Best Roomba Value: [iRobot Roomba 694](https://www.amazon.co.uk/s?k=iRobot+Roomba+694&tag=buybrighter-21) (£279)

Available for £279 at Amazon, this entry-level Roomba has 400ml dustbin, three-hour charge and reliable iRobot app scheduling. Strong on hard floors and pet hair.

Strong Contender: [Roborock Q5](https://www.amazon.co.uk/s?k=Roborock+Q5&tag=buybrighter-21) (£399)

Roborock's Q5 at £399 on Amazon features 2700Pa suction, LiDAR navigation and 180-minute battery. Multi-floor mapping and app customisation make it versatile, just under budget.

Reliable Alternative: [Eufy Clean X8](https://www.amazon.co.uk/s?k=Eufy+Clean+X8&tag=buybrighter-21) (£379)

£379 at Currys, with 2000Pa suction, self-empty option compatible and precise mapping. Good for pet owners with tangle-free brushes.

Comparison Criteria and Table

We compared six models under £400 using expert reviews from Good Housekeeping, Which? and Expert Reviews. Criteria include suction, battery, features, cleaning performance and UK price (current as of major retailers).

| Model | Price | Suction | Battery Life | Bin Capacity | Mop? | Navigation | Score | Key Strength | |-------|-------|---------|--------------|--------------|------|------------|-------|--------------| | Solenco Hobot Legee-D8 | £349 | 2500Pa | 120 mins | 500ml | Yes | LiDAR | 88/100 | Mop performance | | Hoover HG4 Hydro Pro | £299 | 2000Pa | 150 mins | 500ml | Yes | Gyro | 88/100 | Quick recharge | | Eufy RoboVac G30 Hybrid | £269 | 2000Pa | 110 mins | 270ml | Yes | Gyro | 82% | Hybrid value | | iRobot Roomba 694 | £279 | N/A | 90 mins | 400ml | No | Reactive | 80% | App reliability | | Roborock Q5 | £399 | 2700Pa | 180 mins | 470ml | No | LiDAR | 90% | Mapping speed | | Eufy Clean X8 | £379 | 2000Pa | 100 mins | 400ml | No | LiDAR | 85% | Pet hair |

Suction and Cleaning

Roborock Q5 leads with 2700Pa, ideal for carpets. Solenco and Hoover shine on hard floors per Good Housekeeping tests, lifting 90% debris.

Battery and Runtime

Hoover's 150 minutes covers larger homes; Roomba 694 suits quick cleans.

Features

Mopping in Solenco, Hoover and Eufy G30 adds versatility. LiDAR in Roborock and Eufy X8 prevents misses.

Value

Eufy G30 offers most at lowest price; Roomba for brand trust.

Detailed Reviews

[Solenco Hobot Legee-D8](https://www.amazon.co.uk/s?k=Solenco+Hobot+Legee-D8&tag=buybrighter-21)

Expert tests praise its dual function and Amazon price of £349. It handles pet hair and crumbs well, with app reports. Cons: Average carpet dust pick-up.

[Hoover HG4 Hydro Pro](https://www.amazon.co.uk/s?k=Hoover+HG4+Hydro+Pro&tag=buybrighter-21)

£299 makes it accessible. Excellent mopping and 88/100 score, but bag costs add up. Discreet dock avoids bulky stations.

[Eufy RoboVac G30 Hybrid](https://www.amazon.co.uk/s?k=Eufy+RoboVac+G30+Hybrid&tag=buybrighter-21)

Which? notes 90-minute runtime post-charge, mop pad lifts for carpets. £269 price beats pricier siblings like Omni C28 (£500 on sale).

[iRobot Roomba 694](https://www.amazon.co.uk/s?k=iRobot+Roomba+694&tag=buybrighter-21)

Roomba's reactive sensors avoid obstacles reliably. £279 at Amazon, strong on hard floors but no mopping. App integrates with Alexa.

[Roborock Q5](https://www.amazon.co.uk/s?k=Roborock+Q5&tag=buybrighter-21)

TechRadar highlights as top brand; £399 delivers pro features. 2700Pa suction rivals £600 models. No mop, but expandable.

[Eufy Clean X8](https://www.amazon.co.uk/s?k=Eufy+Clean+X8&tag=buybrighter-21)

Similar to Omni but £379 without full self-empty. LiDAR maps accurately; good for multi-room UK flats.

Why Choose These Brands?

Roomba: Pioneer in navigation, reliable for beginners. Under £400 models lack advanced avoidance but clean consistently.

Roborock: Superior LiDAR and suction; Q5 punches above budget weight.

Eufy: Affordable Anker brand with hybrid options. No subscription fees unlike some Roombas.

Maintenance Tips

Empty bins weekly, clean sensors monthly. Replace filters every three months (£10-20). Mop pads washable. Check warranties: typically two years.

For UK buyers, shop Amazon, Currys or brand sites for deals. Prices fluctuate; verify stock.

Common Pitfalls

Avoid models without app control; manual operation frustrates. Skip low-suction (<1500Pa) for carpets. Test dock space pre-purchase.

These picks balance cost and performance based on verified reviews.

Where to Buy

Frequently asked questions

What is the best robot vacuum under £300?

The Hoover HG4 Hydro Pro at £299 offers excellent mopping and vacuuming for small homes, scoring 88/100 in tests.[1]

Do these models have self-emptying?

No full self-empty under £400; Eufy Clean X8 is compatible but dock extra. Manual emptying required.[2][3]

Which is best for pets?

Eufy Clean X8 with tangle-free brushes or Roomba 694 for pet hair pick-up on hard floors.[3]

Can they map multiple floors?

Roborock Q5 and Eufy X8 support multi-floor maps via app; others use single-floor gyro.[5]

Are mopping functions effective?

Yes, Solenco Legee-D8 and Hoover clear smears quickly; Eufy G30 suits light mopping.[1][3]