No socket, no limit
Petrol machines exist for the jobs a socket cannot reach: field gates, farm yards, long driveways, sites without power. They deliver pressure a domestic mains machine cannot, and they bring an engine to maintain and an exhaust that rules out enclosed spaces. What separates them is not the engine badge but the pump — axial or triplex, and whether its seals can be replaced.
2 200 PSI (≈ 152 bar) · 2.3 GPM · single-cylinder air-cooled
The most modest petrol machine here, and the only one listed on all six Amazon stores.
Best for: Large gardens and outbuildings without power, where 150 bar is plenty
≈ 180 €
170–190 bar · 3 400 rpm · axial cam pump · self-priming
A modest pressure range honestly stated, on an axial pump — the cheapest way into petrol here.
Best for: Occasional work away from a socket — a smallholding, a boat yard, a second property
≈ 180 €
3 400 PSI (≈ 234 bar) · 10 l/min · 210 cc · aluminium pump
Specified in PSI and GPM, with an aluminium pump — read the units before comparing it with anything European.
Best for: Occasional heavy outdoor work where budget matters more than brand support
≈ 260 €
234 bar working · 590 l/h · 5.9 hp four-stroke · 9 m hose
The only machine on this site that publishes a working pressure and a flow rate together.
Best for: Farmyards, contractors and large properties without power at the far end
≈ 290 €
241 bar max · 221 bar working · 5.9 hp 212 cc · 9.2 m hose
The rare petrol machine that publishes a working pressure as well as a maximum.
Best for: Yards, farm machinery, long concrete drives and any site with no electricity
≈ £380 / 295 €
That is the only reason to buy petrol. No forty-metre extension lead heating up, no breaker tripping at start-up: the machine goes where the van goes.
On a whole yard or a whole wall, it is the flow rate that decides what time you finish. Pressure only lifts; the volume of water carries away.
An entry-level petrol machine is still heavier and louder than an electric, but it depends on no socket at all. If that is the only need, there is no point paying for the bigger engine.
Often, but not always, and it is rarely the right question. An entry-level petrol machine can deliver less than a good electric. What it really brings is freedom from a socket and tolerance for long sessions.
Ordinary unleaded petrol, an engine oil change according to hours of use, and an air filter to check after every dusty job. Neglecting the oil is the leading cause of failure.
No. A petrol engine produces carbon monoxide, odourless and lethal in an enclosed space. It is used outdoors, away from openings.
Drain the water from the pump, drain or stabilise the petrol, and store it out of frost. Petrol left six months in a carburettor gums it up, and that guarantees a starting failure in spring.
Many petrol models accept drawing from a tank, which domestic electrics almost always refuse. Check it explicitly: it is often the very reason for the purchase.
On entry-level axial-pump models, rarely. On swash-plate or crankshaft pumps, seal kits exist and completely change the machine's life expectancy.
Far longer than a domestic electric, which cuts out or overheats after about twenty minutes. Long sessions are precisely what you pay petrol for.
On machines with a standard engine mount, yes, and that is what extends the pump's life. Monobloc models are scrapped whole: the spec sheet says which is which.
Petrol is not bought for power but for independence. If you have a socket within reach, a good electric will do the job with less noise and zero maintenance. If you have not, look at the tank, at whether the pump can be repaired, and accept the oil change that comes with it.
A figure has to be published by four machines in five to earn its column. Below that, we would be comparing empty cells.
| Model | Price | Amazon reference | Engine |
|---|---|---|---|
| BTGSHYNM 7 hp Petrol Washer | 180 € | B0H2VS9554 | 7 hp four-stroke, single cylinder, air-cooled, 3 400 rpm |
| CHERIKIU 7.5 hp Petrol Washer | 180 € | B0H3VFJJSK | 7.5 hp four-stroke, 3 400 rpm |
| VEVOR 3400 PSI | 260 € | B0DN5S9FD5 | 210 cc four-stroke |
| Güde Fuel 250 | 290 € | B0G1QLTSZQ | 5.9 hp four-stroke |
| Scheppach HCP5000 | 380 € | B0DLB96LZR | 5.9 hp (4.3 kW), 212 cc, four-stroke |
Specifications: manufacturer sheets for cleaning machines and the matching Amazon product pages. Prices and availability: Keepa. Every figure in this table names its source.
Most recent revision in this category: August 15, 2026.
Prices quoted in these summaries are dated readings. The live price is shown next to each product.
