SP46
"Britain's best-selling self-propelled petrol"
RRP New
£329
Manufacturer
Buy Now
£279
Lowest UK retailer
Used Avg
£140
Facebook / eBay UK avg
★ 4.3 (1,240) · Value 8.6/10
Full SP46 review →
HYM510SP
"Cheap self-propelled petrol with steel deck"
RRP New
£329
Manufacturer
Buy Now
£329
Lowest UK retailer
Used Avg
£170
Facebook / eBay UK avg
★ 4.2 (612) · Value 7.8/10
Full HYM510SP review →
Verdict — which one to buy
Our take
UK budget self-propelled rivals. The Hyundai cuts wider (51cm vs 46cm) and has a steel deck; the Mountfield has the better engine and stronger used-market supply. Hyundai for new-buying value, Mountfield for used-buying confidence.
Spec-by-spec
| Mountfield SP46 | Hyundai HYM510SP | |
|---|---|---|
| RRP | £329 | £329 |
| Buy now | £279 | £329 |
| Used avg | £140 | £170 |
| Type | Petrol | Petrol |
| Engine / Power | Stiga ST120 OHV 123cc | Hyundai 173cc OHV |
| Cut width | 46 cm | 51 cm |
| Weight | 27 kg | 34 kg |
| Self-propelled | Yes | Yes |
| Rear roller (stripes) | No | No |
| Mulching | Yes | Yes |
| Bag capacity | 55 L | 70 L |
| Suited to lawn | Medium | Large |
| Noise | 95 dB | 95 dB |
| Rating | 4.3 / 5 | 4.2 / 5 |
| Value score | 8.6 / 10 | 7.8 / 10 |
Pros & cons of each
Pros
- Best-value self-propelled petrol on the UK market
- Stiga engine is reliable and parts are everywhere
- Light at 27kg — easy to push and store
- Huge used supply keeps prices low
Cons
- Plastic deck not as durable as steel
- Cable-operated drive less smooth than Honda
- Rear flap hinge a known weak point
Pros
- 51cm cut is wide for the price
- Steel deck unusual at this price point
- Self-propelled with electric start option
- Hyundai 3-year warranty new
Cons
- Hyundai branded but engine is generic
- Heavier than rivals
- Parts can be slow to source
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