Hyundai 20" 51cm Petrol Lawnmower Review UK 2026
Quick verdict
Score: 6.7/10
Best for: Keeping your lawn tidy to suit its size and terrain
Not for: A lawn much bigger or rougher than this mower is built for
Bottom line: A capable lawn mower (petrol mower, 51cm cutting width, 196cc petrol engine) for a well-kept lawn.
Hyundai's 20 in (51 cm) petrol lawnmower is built around a 196 cc, 4-stroke petrol engine. It is designed to collect grass in a 70 L grass box, targeting users who want a wider cutting pass without relying on mulching.
Key specifications
| Spec area | Listed detail |
|---|---|
| Engine type | 4 stroke petrol |
| Engine size | 196cc |
| Cutting width | 51 cm / 20" |
| Collection | 70L grass bag use |
Pros
- Petrol mower
- 51cm cutting width
- 196cc petrol engine
- Self-propelled
- Grass box collection
Cons
- Petrol needs fuel, oil and more maintenance
- Match the cutting width and power to your lawn size
- Heavier models are harder to manoeuvre and store
Mower Type and Power
This mower is a petrol, 4-stroke model, powered by a 196cc petrol engine rather than a battery or mains electricity. Petrol operation suits regular yard work without relying on charging leads or wall outlets, and the engine provides steady cutting power as long as fuel is available. As a 4-stroke design, it uses a conventional combustion cycle, which can be more straightforward than simpler two-stroke setups, while still requiring routine attention like any combustion engine. Compared with electric options, starting and refuelling are manual steps rather than push-button routines.
Cutting Width and Deck
Why do cutting width and deck matter? The Hyundai 20-inch (51 cm) cutting deck determines how much grass is trimmed in each pass. A wider 51 cm swath can reduce the need for overlapping cuts when mowing planned rows. Deck design also influences airflow and how evenly grass is lifted into the collection bag, particularly when mowing thicker patches. The mower has six cutting heights, so longer growth or weeding can be managed by adjusting the deck position. A wider deck can also require careful steering around edges and obstacles.
Lawn Size and Collection
With a 51 cm cutting width and a grass box, the Hyundai 20-inch 51 cm petrol mower is suited to lawns where mowing in steady passes is practical, rather than very small yards that need frequent turning. The 70 L grass bag is designed to collect clippings during mowing, helping keep them contained instead of scattered. For medium to larger gardens, the bag supports collecting over longer stretches, which can reduce the need for frequent stops. In very small or awkward spaces, the mower may require more bag checks due to the lawn shape and the bag reaching capacity sooner than expected. Plan bag checks around the lawn size and layout.
Ease of Use and Storage
Comfort and convenience matter most during day-to-day mowing, and this Hyundai petrol mower is designed for practical handling in garden use. It is self-propelled, so pushing pressure is reduced over longer runs, particularly when guiding along edges. The cutting height can be adjusted across six positions, enabling quicker changes as grass growth varies. A 70L grass bag reduces the frequency of emptying, although it still needs emptying during heavy growth. For storage, the 51cm cutting width helps it fit more easily in standard sheds. It still requires safe, stable parking.
Who Is This Lawn Mower For?
This self-propelled Hyundai petrol mower suits people who want help pushing the machine over typical garden lawns, particularly during longer mowing sessions and when manoeuvring close to borders. It has a 51 cm cutting width and a 70 L grass bag for households that collect clippings rather than letting them scatter. The 196 cc 4-stroke petrol engine supports a regular mowing routine, not just occasional tidying. It also includes six cutting height options for different grass growth levels. It is less suitable for buyers who need a very compact, lightweight mower.
Where to Buy in the UK
Finding the right place to buy a Hyundai 20" (51cm) 196cc petrol self-propelled lawn mower with a 70L grass bag in the UK often comes down to checking whether the retailer clearly lists the full model details, since many listings can blur blade sizes or engine figures. Buyers can start with major UK retailers and well-known garden centres, then compare product pages. A careful check should confirm the 20" 51cm cutting width, 196cc 4-stroke petrol engine, self-propelled drive, and six cutting heights (if stated). If important parts like the grass bag capacity show as not stated, the purchase may be riskier.
Frequently Asked Questions
Is the Hyundai worth it?
For keeping a lawn tidy with the least hassle, the Hyundai (a petrol mower) does the job with a 51cm cutting width. Whether it suits you comes down to your lawn size, terrain and how much effort you want to put in. Check the current Amazon UK price, as mowers are often discounted in season.
What type of mower is the Hyundai?
The Hyundai is a petrol mower. Petrol mowers are powerful and cordless for big or rough lawns; cordless battery mowers are quiet and low-maintenance for most gardens; corded electric are light and cheap for small lawns; hover mowers glide for edges and slopes; manual push mowers are eco and silent for tiny lawns. Choose the type for your lawn size and terrain.
What is the cutting width of the Hyundai?
The Hyundai has a 51cm cutting width. A wider deck cuts more grass per pass so you finish faster - better for bigger lawns; a narrower deck is lighter and more manoeuvrable around borders and obstacles. Match the width to your lawn size and how tight the spaces are.
How powerful is the Hyundai?
The Hyundai runs on a 196cc petrol engine. Petrol engines give strong, sustained cutting power for long grass and large lawns.
Is the Hyundai self-propelled?
Yes - the Hyundai is self-propelled, so it drives itself forward and you simply steer. That's a real help on larger lawns or any slope, saving you pushing the full weight of the mower. On small flat lawns a push mower is fine and lighter.
Does the Hyundai collect or mulch the grass?
The Hyundai collects clippings into a grass box as you mow, so you get a clean finish and simply empty it when full. Check the grass box capacity against your lawn size to avoid frequent stops.
Is the Hyundai easy to store?
Storage depends on the design - many electric and cordless mowers fold or stand upright to save space, while petrol and ride-on mowers need more room. The Hyundai is a typical example for its type; if space is tight, look for a compact-fold or upright-storage model like Flymo's EasiStore range.