Introduction
Choosing between the Dreame L40 Ultra, the Roborock Qrevo S5V and the Roborock Qrevo Slim can be tricky, especially when all three position themselves as advanced options with multifunction base. The Dreame L40 Ultra arrived in 2024 as a comprehensive offering from its manufacturer, whilst Roborock responds with two alternatives: the recently launched Qrevo S5V from 2025 and the Qrevo Slim from 2024, the latter standing out for its reduced profile. This robot vacuum comparison analyses the real technical differences between these three models to help you decide which best suits your home.
All three units feature a multifunction base that washes and dries the mops, but the differences in navigation, brushing systems and smart functions mark distinct territories. The Dreame robot vacuum opts for advanced detection technology, whilst the Roborock robot vacuum is divided between raw power in the S5V and compact versatility in the Slim.
Power and Suction
The Roborock Qrevo S5V positions itself as the best robot vacuum 2025 in terms of pure power, delivering 12,000 Pascals of suction. This figure exceeds by 1,000 Pa both the Dreame L40 Ultra and the Roborock Qrevo Slim, both with 11,000 Pa. In practice, that difference can be noticeable when vacuuming medium-pile carpets or heavier debris embedded in irregular textures.
The brushing systems reveal different philosophies. The Dreame L40 Ultra mounts the TriCut 3.0, which combines bristles with blades to cut tangled hair, whilst the Qrevo S5V uses the DuoDivide Antienredos, designed to push hair towards the central suction gap. The Qrevo Slim equips a dual brush with a similar approach to the S5V.
Brush lifting marks a clear advantage for Dreame. The L40 Ultra can lift both the main and side brush during mopping, preventing them from touching the wet floor or carpets. The Qrevo S5V lifts neither, which limits its versatility in homes with a combination of hard floors and carpets. The Qrevo Slim lifts the main brush but not the side one, remaining in an intermediate position.
Regarding the side brush, the L40 Ultra and the Qrevo Slim feature extension to better reach corners. The S5V does without this function. The side brush of the Dreame and the S5V incorporates anti-tangle design, whilst the Slim does not include it. For homes with long-haired pets, these details are worth considering.
Mopping
All three models employ two rotating mops, but the differences in extension and intelligent management are relevant. The Dreame L40 Ultra extends the mops with its own lateral movement (Roboswing), allowing it to reach skirting boards and edges more effectively. Both Roborock models also extend mops, although without that characteristic swinging movement of Dreame.
Mop lifting reaches 10.5 mm on the L40 Ultra, compared to 10 mm on both Roborock models. A minimal difference that barely influences real-world use. What does mark a distance is the Dreame's ability to automatically remove the mops at the base when you only want to vacuum, a function absent in the Roborock models.
The dirt detection system clearly separates the models. The Dreame L40 Ultra detects dirt on both the mops and the floor, adjusting scrubbing according to need. The Roborock Qrevo Slim also incorporates both detections. The Qrevo S5V, surprisingly, does not include either of these functions, which is striking in a 2025 model.
The bases of all three wash the mops with hot water and dry them with hot air. The Dreame L40 Ultra adds second-generation tray self-cleaning, improving maintenance compared to the first generation of the Qrevo Slim. The S5V lacks tray self-cleaning, requiring more frequent manual intervention.
Navigation System
Here we find the biggest gap between the models. The Dreame L40 Ultra integrates LiDAR turret combined with dual AI camera, front 3D laser sensor and LED for night vision. It recognises up to 100 different objects, including pets and curtains. Additionally, it allows remote access to the camera for home surveillance.
The Roborock Qrevo S5V mounts LiDAR turret with obstacle avoidance, but does without AI camera, 3D sensor, night LED and remote access. It does not recognise pets or curtains specifically. This simplification considerably reduces intelligent recognition capabilities.
The Roborock Qrevo Slim recovers ground with its StarSight 1.0 system, which includes dual AI camera, 3D laser sensor, night LED and remote camera access. It recognises 73 objects and detects pets, though not curtains. Its RR Mason 11.0 algorithm processes information efficiently.
For homes with pets, young children or multiple obstacles on the floor, the Dreame L40 Ultra and the Qrevo Slim offer more sophisticated navigation than the S5V. Remote camera access adds surveillance functionality that can be useful when you're away from home.
Autonomy and Battery
All three robots mount 5,200 mAh batteries, but performance varies slightly. The Dreame L40 Ultra reaches 194 minutes of autonomy, whilst both Roborock models remain at 180 minutes. That 14-minute difference can translate into approximately 20-25 additional square metres of surface covered in a single run.
For large homes, those extra minutes from the Dreame can avoid intermediate recharges. In flats of up to 150 square metres, any of the three completes cleaning without problems. The table does not specify charging times, but in practice all return automatically to the base when the battery runs low.
Smart Functions
The ability to overcome obstacles shows the Dreame L40 Ultra as the most capable, crossing steps of up to 22 mm. Both Roborock models remain at 20 mm. Those extra 2 mm allow the Dreame to navigate certain door thresholds or decking level differences that could stop the Roborock models.
The Dreame L40 Ultra and the Roborock Qrevo Slim incorporate their own voice assistant, allowing control by direct commands to the robot. The Qrevo S5V does not include this function, although all three are compatible with Alexa and Google Home for integration into home automation ecosystems.
Multifunction Cleaning Base
The differences in the base directly affect maintenance. The Dreame L40 Ultra equips a 3.2-litre dust bag, compared to the 2.7 litres of both Roborock models. Greater capacity means less frequent emptying, especially relevant in homes with pets.
The Dreame's water tanks also exceed the Roborock models: 4.5 litres of clean water versus 4 litres, and 4 litres of dirty water compared to 3.5 litres. In large homes, this difference can determine whether you complete mopping the entire house without refilling or emptying tanks.
Only the Dreame L40 Ultra includes a detergent tank in the base, dispensing it during mop washing. The Roborock models require manually adding product to the clean water tank if you wish to use it. Additionally, Dreame offers an optional kit for connection to water pipes and drainage, eliminating the need to manually refill and empty tanks. Neither of the Roborock models has this option.
The Dreame's wash tray self-cleaning is second generation, improving the first-generation system of the Qrevo Slim. The S5V lacks this function, requiring periodic manual cleaning of the tray where the mops are washed.
Dimensions
The Roborock Qrevo Slim justifies its name with 82 mm height, making it the only one capable of sliding under low furniture, sofas with short legs or beds with little clearance from the floor. The Qrevo S5V measures 96.5 mm and the Dreame L40 Ultra reaches 103.8 mm, remaining outside confined spaces.
In diameter there are barely any differences: 350 mm the Dreame, 353 mm both Roborock models. All three share base width (340 mm), but height and depth vary. The Dreame's base measures 590.5 mm high by 456.7 mm deep, whilst the Roborock bases are lower (521 mm) but deeper (487 mm). This affects where you can position the base in your home.
The robot's dust bin varies: 330 ml in the S5V, 300 ml in the L40 Ultra and 220 ml in the Qrevo Slim. The robot's water tank is 80 ml in the first two and 72 ml in the Slim. These differences barely influence daily use, as the multifunction base automatically manages emptying and filling.
Real-world user experience
For large homes with more than 120 square metres, the Dreame L40 Ultra offers the most balanced combination: greater autonomy, larger tanks in the base and intelligent dirt detection. Its ability to recognise 100 objects and automatically remove mops facilitates daily use without intervention.
The Roborock Qrevo S5V stands out in homes where suction power is a priority. Its 12,000 Pa makes a difference on carpets or if you have pets that shed a lot of hair. However, the absence of AI camera and dirt detection places it below in intelligence, requiring greater manual supervision.
The Roborock Qrevo Slim solves the problem of confined spaces. If you have low furniture or beds with little height, its 82 mm allows cleaning where others cannot access. It maintains AI camera and dirt detection, sacrificing only internal tank capacity, which is not critical thanks to the multifunction base.
In homes with pets, the Dreame L40 Ultra and the Qrevo Slim specifically recognise animals, avoiding accidents with feeders or toys. The dirt detection system on mops is especially useful if your pets generate frequent stains.
The possibility of connecting the Dreame to pipes via optional kit can be decisive if you seek total automation, although it involves minor plumbing work. The Roborock models maintain the traditional system of removable tanks.
Conclusion: Which to choose?
Choose the Dreame L40 Ultra if you seek the most complete package in smart functions and autonomy. Its dual camera, recognition of 100 objects, dirt detection, detergent tank and greater storage capacities make it the most versatile option. Ideal for large homes with pets where you value maximum automation and are willing to invest in latest-generation technology. The possibility of connection to pipes adds a bonus if you seek to completely forget about maintenance.
Choose the Roborock Qrevo S5V if you prioritise suction power over artificial intelligence. Its 12,000 Pa exceeds any competitor in this comparison, proving the best option for thick carpets or floors with persistent dirt. Although it lacks AI camera and advanced detection functions, its reliability as a world-leading brand and its greater vacuuming capacity compensate if you do not need intelligent object recognition. A good choice for those who prefer ef
