---
title: "Stihl RMI 422 P: specs and what the maker claims"
description: "Stihl RMI 422 P robot mower: claims lawns up to 16,100 sq ft, needs a boundary wire. The maker's claims, not our tests."
canonical: "https://homerobotcompared.com/robot-mowers/stihl-rmi-422-p"
brand: "Stihl"
category: "Lawn mowers"
updated: "2026-10-09"
data_snapshot: "2026-10-07"
---

# Stihl RMI 422 P

Lawn mower by Stihl. Every figure below is what the maker claims, collected 2026-10-07. We have not tested this robot.

List price: not available.

## Lawn and slopes

| Item | Value |
| --- | --- |
| Lawn size it can handle | 16,100 sq ft (1,500 m²) |
| Size group | large |

## How it finds its way

| Item | Value |
| --- | --- |
| Guidance | Boundary wire |
| Boundary wire | Yes |
| Wire-free | No |
| Needs a base station on the lawn | No |

## Where it is sold

| Item | Value |
| --- | --- |
| United States | No |
| United Kingdom | No |

Thin sourcing: check the maker's page. Source: https://www.justlawnmowers.co.uk/stihl-rmi-422-p-imow-robotic-lawn-mower.html

Notes: UK retailer lists discontinued at 1339; US sold only Jan 2017-Jul 2022 per CPSC recall; RMI 522/632/732 not covered

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Web page: https://homerobotcompared.com/robot-mowers/stihl-rmi-422-p