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Robot vacuum comparison
At £340–£430 used, the iRobot Roomba j7+ is a premium vacuum with a bench score of 8.7. At £140–£200, the Eufy RoboVac X8 scored 7.6. That is a £200 gap for a 1.1 point difference in bench score. Whether the gap is worth it depends entirely on what you are cleaning and whether pet obstacle avoidance matters to you.
Robot vacuum
Robot vacuum
| Aspect | iRobot Roomba j7+ | Eufy RoboVac X8 |
|---|---|---|
| Bench score | 8.7 / 10 | 7.6 / 10 |
| Used price (UK) | £340–£430 | £140–£200 |
| Retail price (new) | £549 | £319 |
| Navigation | Camera-based + iAdapt 3.0 | Lidar (dToF) |
| Suction | 10× AeroForce (standard) | Twin-turbine, strong on hard floors |
| Self-empty dock | Yes — Clean Base included | No self-empty dock |
| Obstacle avoidance | PrecisionVision — pet waste specific | Basic reactive avoidance |
| Carpet performance | Excellent | Poor on thick pile |
| Best for | Pets, mixed floors, self-management | Hard floors, budget buyers |
Choose iRobot Roomba j7+
Choose the Roomba j7+ if you have pets, thick carpet, or you want the Clean Base self-empty dock. The camera-based obstacle avoidance and higher suction on carpet justify the price premium for most households.
Choose Eufy RoboVac X8
Choose the Eufy RoboVac X8 if your home is primarily hard floor, you have no pets, and your budget is under £200. At £150–£175 used it is one of the most affordable lidar-navigation robot vacuums available in the UK, and on hard floors it performs well above its price point.
Bottom line
For a hard-floor flat or house without pets, the Eufy X8 at £160 used is a strong budget buy that performs well enough to justify skipping the j7+. For anything with carpet, pets, or a requirement for self-emptying, spend the extra on the j7+.
Yes for pet households and carpeted rooms. The j7+'s Clean Base self-empty dock and PrecisionVision camera are both hardware features the X8 does not have. The 1.1 bench score gap understates the real-world difference on thick carpet, where the X8 struggles noticeably. On hard floors only, the value case for the j7+ at £380 over the X8 at £160 is weaker.
On low-pile and medium-pile carpet, adequately. On thick or shag pile, the twin-turbine design does not generate enough suction to lift deeply embedded debris, and the robot can struggle to maintain traction. Our bench test scored carpet performance 6.5/10. If carpet is your primary surface, the X8 is not the right choice.
The Roomba j7+ is easier to maintain long-term. iRobot spare parts — batteries, brushes, filters, Clean Base bags — are widely stocked at Argos, Amazon UK, and specialist retailers. Eufy X8 parts are available but less widely distributed, and the brand's support for older models is less consistent. For a used purchase with an extended ownership horizon, the j7+'s parts ecosystem is a meaningful advantage.