In a nutshell

With an easy push button start, three speeds and a rear roller, this was awarded a BBC Gardeners' World magazine Best Buy award. It's easy to use and comes with a two year warranty.

What we tested

  • Ease of Handling
    A star rating of 5.0 out of 5.
  • Cutting Performance
    A star rating of 4.0 out of 5.
  • Setting up / Storage
    A star rating of 5.0 out of 5.
  • Value for money
    A star rating of 5.0 out of 5.
Overall Rating
A star rating of 4.8 out of 5.


  • Push-button start
  • Battery charges separately
  • Light and easy to handle
  • Simple to adjust cutting height
  • Rear roller for stripes
  • Variable speed


  • Comparatively small collection bag

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What are the main features of the Cobra RM433 SPBI petrol mower?

This cut and collect petrol mower has a cutting width of 43cm and six heights of cut, ranging from 17 - 75mm, which are easily adjusted with a simple, single lever. It has a push button start powered by a lithium ion battery, which will power over 50 starts on a full charge and it has a charge level indicator so you know when it's running low and needs charging. the battery also acts as a good safety feature – remove the battery when the mower's not in use and it will stop children, or anyone else, accidentally starting the mower. The Cobra is self propelled and has three speeds to choose from depending on where you’re mowing. A plastic rear roller creates a good stripe and it comes with a 50 litre collection bag with an indicator flap so you know when it’s full and ready to empty into the compost heap.

What is the Cobra RM433 SPBI petrol mower like to use?

The push button start on this mower is very welcome and means the end of struggling with a pull cord to get things moving. It has three speeds and the top speed is fast, which helps you mow larger areas quickly. The mower feels light and nice to handle and the lowest speed helps you manoeuvre around detailed areas like borders, paths and trees with ease. The plastic roller also adds weight and stability to the mower helping you get right over the edge of borders for a neat cut. It’s also easy to use and adjust the speed as well as the height of cut. Only the collection bag feels a bit small, especially compared to the other mowers in the test.

Is the Cobra RM433 SPBI petrol mower easy to store?

Light and easy to manoeuvre in an out of the shed this mower also has quick release levers on the handle so it's fast and simple to fold them down for storage. The fabric grass collection bag can also be removed and packed flat on top of the deck to take up less room.

Is the Cobra RM433 SPBI petrol mower good value for money?

This is a simple, quality mower with three speeds and a rear roller and it’s easy and light to use. It comes with a two-year warranty and is one of the cheapest petrol mowers in our test. We think it’s excellent value for money.


For more reviews, read our round-up of the best electric lawn mowers.

Product Specifications

NameCobra RM433SPBI petrol mower
Lawn mower typePetrol
Powered byPetrol
Engine capacity150cm³
Cutting height17-75mm
Number of cutting height settings6
Cutting width43cm
Collection capacity50l