iRobot Roomba i3 vs Roomba i8+: Which Robot Vacuum Is Better?

Tested using Methodology v1.0

Updated Jun 25, 2025 03:21 PM

See iRobot Roomba i3 Review

Wet Compatible No

Lowest Height Cleared 9.5 cm (3.7'')

Obstacle Avoidance Technology Light-Based

Max Threshold Height 1.9 cm (0.7")

Anti-Allergy Filter (HEPA) Yes

Wet Compatible No

Lowest Height Cleared 9.5 cm (3.7'')

Obstacle Avoidance Technology Light-Based

Max Threshold Height 1.9 cm (0.7")

Anti-Allergy Filter (HEPA) Yes

Recommended in 1 article:
iRobot

Our Verdict

iRobot Roomba i3

iRobot Roomba i8+

The iRobot Roomba i8+ is better than the iRobot Roomba i3. The i8+ has a longer overall battery life, delivers superior performance on bare floors as well as carpets, and does a better job of maneuvering itself.

Variants

Roomba i3+ EVO (Woven Neutral)
Roomba i3 EVO (Woven Neutral)

Roomba i8+ (Medium Silver)

Review

See iRobot Roomba i8+ Review

Check Price

Woven Neutral

Roomba i3+ EVO

Medium Silver

Roomba i8+

Woven Neutral

Roomba i3 EVO

Medium Silver

Roomba i8+

BestBuy.com

Medium Silver

Roomba i8+

Walmart.com

Medium Silver

Roomba i8+

Lowes.com

Medium Silver

Roomba i8+

HomeDepot.com

Medium Silver

Roomba i8+

iRobot

Main Differences for

Multi-Surface Household

Threshold

0.10

Multi-Surface Household

0.0

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Full Comparison

Multi-Surface Household

0.0

Pets

0.0

Debris Pickup: Hard Floor

0.0

Debris Pickup: Carpet

0.0

Debris Pickup: Pet Hair

0.0

Obstacle Handling

0.0

Design

Build Quality

N/A

Build Quality Picture

SAMPLE

for pictures & test results

SAMPLE

for pictures & test results

Vacuum & Mop Combo

Locked

Show Text

User Maintenance

N/A

Maintenance Picture

SAMPLE

for pictures & test results

SAMPLE

for pictures & test results

Brushroll Cleaning Video

SAMPLE

for videos & test results

SAMPLE

for videos & test results

Show Text

Recurring Cost

N/A

Recurring Cost Picture

SAMPLE

for pictures & test results

SAMPLE

for pictures & test results

Bag Part Number

Locked

Filter Part Number

Locked

HEPA Filter Part Number

Locked

Show Text

Dimensions

Robot Vacuum Dimensions

SAMPLE

for pictures & test results

SAMPLE

for pictures & test results

Robot Vacuum Height

Lock cm (Lock")

Robot Vacuum Width

Lock cm (Lock")

Robot Vacuum Depth

Lock cm (Lock")

Docking Station Dimensions

SAMPLE

for pictures & test results

SAMPLE

for pictures & test results

Docking Station Height

Lock cm (Lock")

Docking Station Width

Lock cm (Lock")

Docking Station Depth

Lock cm (Lock")

Show Text

Internal Dirt Compartment

N/A

Dirt Compartment Photo

SAMPLE

for pictures & test results

SAMPLE

for pictures & test results

Dirt Compartment Capacity

Lock L

Full Indicator

Locked

Show Text

Station Maintenance Capabilities

N/A

Station Photo

SAMPLE

for pictures & test results

SAMPLE

for pictures & test results

Auto Empty

Locked

Bagless Station

Locked

Dirt Compartment Capacity

Lock L

Automatic Tank Refill

Locked

Mop Washing

Locked

Mop Drying

Locked

Show Text

In The Box

In The Box Picture

SAMPLE

for pictures & test results

SAMPLE

for pictures & test results

Show Text

Battery

N/A

Minimum Battery Life

Lock min

Maximum Battery Life

Lock min

Recharge Time

Lock min

Removable Batteries

Locked

Show Text

Quality-Of-Life Features

Picture Of Controls

SAMPLE

for pictures & test results

SAMPLE

for pictures & test results

Power Adjustment

Locked

Easy On/Off

Locked

Surface Type Adjustment

Locked

Show Text

Brushroll And Tools

Brushroll And Tools Photo

SAMPLE

for pictures & test results

SAMPLE

for pictures & test results

Brushroll Setup

Locked

Brushroll Type

Locked

Side Brush Setup

Locked

Side Brush Type

Locked

Performance

Hard Floor Pickup

N/A

Hard Floor Pickup Video

SAMPLE

for videos & test results

SAMPLE

for videos & test results

Hard Floor Pickup Post Test

SAMPLE

for pictures & test results

SAMPLE

for pictures & test results

Show Text

High-Pile Carpet Pickup

N/A

High-Pile Carpet Pickup Video

SAMPLE

for videos & test results

SAMPLE

for videos & test results

High-Pile Carpet Pickup Post Test

SAMPLE

for pictures & test results

SAMPLE

for pictures & test results

Show Text

Low-Pile Carpet Pickup

N/A

Low-Pile Carpet Pickup Video

SAMPLE

for videos & test results

SAMPLE

for videos & test results

Low-Pile Carpet Pickup Post Test

SAMPLE

for pictures & test results

SAMPLE

for pictures & test results

Show Text

Pet Hair Pickup

N/A

Pet Hair Pickup Video

SAMPLE

for videos & test results

SAMPLE

for videos & test results

Pet Hair Pickup Post Test

SAMPLE

for pictures & test results

SAMPLE

for pictures & test results

Show Text

Airflow

N/A

Maximum Airflow Video

SAMPLE

for videos & test results

SAMPLE

for videos & test results

Maximum Head Airflow

Lock CFM (Lock m³/min)

Show Text

Noise

N/A

Noise Video

SAMPLE

for videos & test results

SAMPLE

for videos & test results

Bare Floor

Lock dBA

Low-Pile Carpet

Lock dBA

Show Text

Household Adaptability

N/A

Household Adaptability

SAMPLE

for videos & test results

SAMPLE

for videos & test results

Show Text

Obstacle Avoidance

N/A

Obstacle Avoidance Technology

Locked

Object Recognition

Locked

Obstacle Video

SAMPLE

for videos & test results

SAMPLE

for videos & test results

Bare Floor: Avoidance Rate

Lock%

Bare Floor: Intervention Rate

Lock%

Carpet: Avoidance Rate

Lock%

Carpet: Intervention Rate

Lock%

Always Avoided Pet Waste

Locked

Height Clearance

N/A

Height Clearance Video

SAMPLE

for videos & test results

SAMPLE

for videos & test results

Lowest Height Cleared

Locked

Threshold Clearance

N/A

Low Threshold Video

SAMPLE

for videos & test results

SAMPLE

for videos & test results

High Threshold Video

SAMPLE

for videos & test results

SAMPLE

for videos & test results

Max Threshold Height

Lock cm (Lock")

Air Quality

Sealing Quality Video

SAMPLE

for videos & test results

SAMPLE

for videos & test results

Anti-Allergy Filter (HEPA)

Locked

Show Text

Cracks

N/A

Cracks Video

SAMPLE

for videos & test results

SAMPLE

for videos & test results

Wood Cracks Post Test

SAMPLE

for pictures & test results

SAMPLE

for pictures & test results

Show Text

Stains

N/A

Stain Video

SAMPLE

for videos & test results

SAMPLE

for videos & test results

Stain Pickup Post Test

SAMPLE

for pictures & test results

SAMPLE

for pictures & test results

Show Text

Water

N/A

Wet Compatible

Locked

Water Video

SAMPLE

for videos & test results

SAMPLE

for videos & test results

Water Pickup Post Test

SAMPLE

for pictures & test results

SAMPLE

for pictures & test results

Show Text

Automation

Physical Automation

N/A

Recharge And Resume

Locked

Pathing Algorithm

Locked

Physical Boundary Markers

Locked

Scheduled Start Buttons

Locked

Cycle Control Buttons

Locked

Navigation Control Buttons

Locked

Show Text

Companion App Automation

N/A

Companion App Screen Grabs

SAMPLE

for pictures & test results

SAMPLE

for pictures & test results

App Name

Locked

Software Boundary Markers (No-Go Zones)

Locked

App Scheduled Start

Locked

App Cycle Control

Locked

Navigation Control Within App

Locked

Show Text

To Be Deleted

Check Price

Woven Neutral

Roomba i3+ EVO

Medium Silver

Roomba i8+

Woven Neutral

Roomba i3 EVO

Medium Silver

Roomba i8+