iRobot Roomba 891 Robot Vacuum: Trusted Review In 2021

Solidly built with Wi-Fi connectivity. The iRobot Roomba 891 performs well on all types of floors, and it does an outstanding job of lifting pet hair. iRobot equipped the Roomba 891 with an allergen-trapping filter, dual anti-tangle brushrolls and a long-lasting lithium-ion battery. It also has an angled side brush that cleans along wall edges and deep into corners.

With the smartphone app or the virtual assistant of your choice, you can spot clean the robot. The scheduling function on the iRobot HOME app further automates the Roomba 891, ensuring your floors are vacuumed even when you aren’t home. Quick-thinking sensors keep the robot out of dangerous situations, and frankly, the black and champagne gold finish is eye-catching.

Roomba 891

Roomba 891 Price


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In short, the Roomba 891 robot vacuum loosens, pulls, and suctions dirt with up to 5x more air power as compared to the previous models. Dirt Detect sensors alert the robot vacuum to clean more thoroughly on concentrated areas of dirt. The 891 model is ideal for homes with pets, as the unit features tangle-free brushes and a high-efficiency filter. Just press CLEAN or schedule the Roomba on the go with the iRobot HOME App.

iRobot Roomba891
Suction Power 1000 Pa
Сleaning Area 969 ft2
Dust Container300 ml
Battery Capacity 1800 mAh
Run-time 60 min
Charging Time 120 min
Noise68 db
Weight 8.40 lbs
Width 13.90 in
Height 3.60 in
ReleaseMay, 2017
PriceClick here


Stylish Appearance

While appearance isn’t anyone’s main concern, the Roomba 891 is a great-looking robotic vacuum. For this model, iRobot chose a two-toned finish. Adding champagne gold alongside black creates a sophisticated, almost elegant, robot that anybody would love to see zooming around their house.

Edge-Sweeping Side Brush

On the Roomba 891, there’s one three-propeller brush, which is affixed to the side of the robo vac. This brush is situated at a 27-degree angle to enhance its ability to reach the full height of your baseboards. Additionally, the angled position gives the brush an edge when it comes to the volume of dust it collects.

iRobot Roomba 891 Robot Vacuum
Roomba 891
iRobot Roomba 891 Cleaning
Suction Power 1000 Pa
Сleaning Area 969 ft2
Dust Container300 ml
Auto Dirt Disposal no
Wet Mopping no
Barrier-cross Height 0.63 in
HEPA Filtration yes
Washable Filter no


Dual Brushrolls

Most robots only have one brushroll, but not this Roomba. The 891 model is equipped with a pair of brushrolls that rotate counter to one another, boosting their hair and debris pickup prowess. Both rolling bushes are made of rubber, which staves off wrapped hair.

The rubber material also lends flexibility to the brushrolls for closer contact to the floor.

Strong, Dirt-Detecting Suction

In comparison to the Roombas from iRobot’s 600 Series, the 891 produces five times greater suction, making it better able to lift heavy and stubborn debris. The inclusion of dirt-detecting sensors allows the Roomba 891 to increase its suction whenever it finds areas of the floor that are dirtier than others. Plus, the robot’s floor plate rises and falls to match the height of the floor, putting the suction inlet as low to the ground as possible.

Several Cleaning Modes

There are several ways you can use the Roomba 891 to vacuum your floors. In auto mode, the robot will clean all the floors in your house. In spot mode, the 891 will move in a small spiral to eliminate piles of debris. Also, there’s a scheduling mode. To use this reoccurring mode, choose a time and pick the days you want the robot to clean.

Roomba 891 Robot Vacuum
Roomba 891

Triple-Button Control Panel

In the center of the robot’s top, there are three localized controls. The flat chrome button in the middle lets you begin an auto-clean mode. Above this button, the target emblem starts a spot-mode session. Below the auto-clean button, a house is depicted. When pressed, the 891 drives and docks to its charging base.

Smartphone App

Put the robot to work wherever you may be. The Roomba 891 is enabled with Wi-Fi, so you can connect and control it via your smartphone. The iRobot HOME app can be installed on iPhones and Androids. With the app, you can set a schedule, choose a cleaning mode, receive push notifications and get updates about the robot’s current cleaning status.

iRobot Roomba 891 Control
Scheduling yes
IR Remote Control no
App yes
Wi-Fi Frequency Bands 2.4 GHz
Amazon Alexayes
Google Assistantyes
Virtual Walls no


Voice Commands

You don’t even need to use your hands to start a cleaning session. iRobot gives you the option of pairing the Roomba 891 to an Amazon Alexa or Google Assistant device. With either smart assistant, you can initialize auto clean, pause the robot and send it to the dock.

Roomba 891 Robot Vacuum
Roomba 891

Runs for an Hour

To power the Roomba 891, iRobot used a lithium-ion battery. The battery has a capacity of 1,800 mAh, giving the robot a runtime of about 1 hour per cycle. When the battery needs to be replenished or the current cleaning session is complete, the 891 automatically goes to the dock for a recharge.

iRobot Roomba 891 Battery
Battery Capacity 1800 mAh
Runing time 60 min
Charging Time 120 min
Rated Power33 W


Clog-Reducing Dirt Bin

Press the button at the bottom of the Roomba 891’s cover to instantly release the 10-ounce dirt bin from its side compartment. Since the mouth is wide, the airflow doesn’t become restricted as debris enter into the bin, lowering the chance of obstructions from forming in the air path. Anytime you want to know the bin’s fill level, you can check the iRobot HOME app.

10-Micron Filter

On the dirt bin, there is a small door, which houses the 891’s filter. The compact cartridge’s pleats are efficient, capturing 99 percent of particles as small as 10 microns. You can dust off the filter as needed, but it generally lasts about 2 months. However, filter replacements for the Roomba 891 are only a couple of bucks.

iAdapt and RCON

The Roomba 891 relies on iRobot’s iAdapt technology to help it navigate. With iAdapt at the helm, the robo vac split-second decisions that help it determine the safest route with the fewest obstacles. It even has a room confinement (RCON) sensor that’s compatible with one of iRobot’s dual-mode virtual walls.

Roomba 891 Review
Roomba 891

Stair Avoidance

iRobot put six ledge-detection sensors on the front and rear of the Roomba 891 to prevent it from falling down the stairs. When the robotic vacuum gets near a drop-off, it turns on a caster wheel and moves in a different direction. To help you carry the 8-pound robot to the second story of your home, there’s an integrated handle on the top cover.

Summary of the iRobot Roomba 891 Features

Comparing the Roomba 891 to Other Roomba Models

Difference Between the Roomba 891 and E5

iRobot Roomba891E5
Suction Power 1000 Pa1700 Pa
Сleaning Area 969 ft21615 ft2
Dust Container300 ml500 ml
Noise68 db65 db
Barrier-cross Height 0.63 in0.71 in
Battery Capacity 1800 mAh1800 mAh
Runing time 60 min90 min
Charging Time 120 min120 min
Rated Power33 W50 W
Weight 8.40 lbs7.43 lbs
Height 3.60 in3.70 in
ReleaseMay, 2017Sep 2018
PriceCheck price


The Roomba E5 outshines the Roomba 891 on basically all fronts. We do like the fact that the 891 is lower in height, but it is not a reason for not picking the Roomba E5 over the 891.

Difference Between the Roomba 891 and 675

iRobot Roomba891675
Battery Capacity 1800 mAh1800 mAh
Runing time 60 min90 min
Charging Time 120 min120 min
Noise68 db62 db
Suction Power 1000 Pa600 Pa
Сleaning Area 969 ft21615 ft2
Dust Container300 ml350 ml
HEPA Filtration yesno
Carpet Boost nono
Cliff Sensor yesyes
Dirt Detect yesno
Full Bin Indicator yesno
Weight 8.40 lbs7.94 lbs
Height 3.60 in3.58 in
ReleaseMay, 2017Jul, 2018
PriceCheck price


The Roomva 675 is one of iRobot’s bestseller. We do, however, pick the Roomba 891 over the 675 as it has better suction power and HEPA filtration.

Difference Between the Roomba 891 and 671

iRobot Roomba891671
Suction Power 1000 Pa600 Pa
Сleaning Area 969 ft21615 ft2
Dust Container300 ml350 ml
Noise68 db62 db
Battery Capacity 1800 mAh1800 mAh
Runing time 60 min90 min
Charging Time 120 min120 min
Rated Power33 W33 W
Cliff Sensor yesyes
Dirt Detect yesno
Full Bin Indicator yesno
HEPA Filtration yesno
Weight 8.40 lbs7.94 lbs
Height 3.60 in3.58 in
ReleaseMay, 2017Jun, 2018
PriceCheck price


It seems to us the 671 model is “weaker” when compared to the Roomba 891. This model has less suction power and doesn’t come with an HEPA filter. Overall, we would pick the Roomba 891 over the 671 any day.

Difference Between the Roomba 891 and i7

iRobot Roomba891i7
Suction Power 1000 Pa1700 Pa
Сleaning Area 969 ft21991 ft2
Dust Container300 ml500 ml
Battery Capacity 1800 mAh3300 mAh
Runing time 60 min75 min
Charging Time 120 min120 min
Rated Power33 W54 W
Barrier-cross Height 0.63 in0.79 in
HEPA Filtration yesyes
Washable Filter nono
Virtual Walls noyes
Weight 8.40 lbs7.28 lbs
Height 3.60 in3.62 in
ReleaseMay, 2017Sep 2018
PriceCheck price


The Roomba i7 outshines the Roomba 891 on almost all fronts. With better suction power and an overall better performance we can say that the i7 is the better choice, but for a heftier price.

Difference Between the Roomba 891 and 890

Roomba890891
Suction Power 1000 Pa1000 Pa
Сleaning Area 969 ft2969 ft2
Dust Container300 ml300 ml
AccessoriesExtra filter
Virtual WallYesNo
PriceClick hereClick here


There is not much of a difference between the roomba 891 and the 890. The 890 gets an extra virtual wall, but the performance of both robot vacuums is the same.

Related Roomba Articles

Buying Guides
Best Roomba Robot Vacuums

Single Reviews
Roomba 675
Roomba 692
Roomba E5
Roomba i3+
Roomba i4+
Roomba i6+
Roomba i7+

Comparison Articles
Roomba i3+ vs i7+
Roomba i6+ vs i7+
Roomba iSeries Comparison

Low Price, High Value

You’ll want to pull out and show off the Roomba 891 for the way it looks alone. In terms of its practicality, you won’t be disappointed. There are convenient smartphone app and voice command options. You can set a schedule and track the fill level of the dirt bin.

The robot offers a spot-clean mode for small, quick cleanup jobs. Plus, it has two brushrolls and a self-adjusting floor plate. The features you get for the low price makes the iRobot Roomba 891 a no-brainer buy.

iRobot Roomba 891 Specs
Weight 8.40 lbs
Width 13.90 in
Height 3.60 in
ReleaseMay, 2017
PriceClick here


Roomba 891

Roomba 891 Robot Vacuum Price

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Last update on 2021-09-24 / Affiliate links / Images from Amazon Product Advertising API



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