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Kärcher K 2 Classic review: the smallest Kärcher, 110 bar in 3.4 kg, and the jobs it is the right size for

Kärcher's entry pressure washer: 110 bar, 360 litres an hour and 20 square metres an hour from a 1.4 kW air-cooled motor, a spray lance and a Dirt Blaster, a 3 m hose and 3.4 kg without accessories. This review is about what 110 bar cleans and what it does not, the difference the Dirt Blaster makes, what the short hose means in practice, and when the step up to a K 4 is worth taking.

By The City Bits deskUpdated 11 November 2026Facts checked 11 November 2026

Kärcher K 2 Classic compact pressure washer in yellow with a short hose and trigger gun
Pictured: Kärcher K 2 Classic.

Verdict

What it is

the pressure washer reviewed

Kärcher K 2 Classic

Kärcher K 2 Classic compact pressure washer in yellow with a short hose and trigger gun
Pressure
110 bar
Flow
360 l/h
Area per hour
20 m²
Power
1400 W
Motor
Air-cooled
Hose
3 m
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Check price

A mains pressure washer rated by Kärcher at 110 bar, 360 litres an hour and 20 square metres of cleaning an hour, from a 1.4 kW air-cooled motor. It comes with a one-way spray lance and a Dirt Blaster rotating lance, a 3 m high-pressure hose, and accepts water up to 40 °C. 3.4 kg without accessories. From Kärcher UK.

Strengths

  • 3.4 kg and small enough for a cupboard
  • Dirt Blaster lance included
  • The cheapest Kärcher

Limitations

  • 3 m hose
  • Air-cooled motor, for occasional use
  • Half the area per hour of a K 4

Good for

  • a flat, a car, a small paved yard

Look elsewhere if

  • a large patio or a driveway

What 110 bar cleans

Enough for a car, which needs less pressure than you might think, bikes, plastic garden chairs, bins, a fence panel and a balcony. On a small paved area it does the job with the Dirt Blaster. Kärcher’s own figure for area, 20 square metres an hour, is two thirds of the K 4 Classic’s 30, and that is the honest measure of the difference: same jobs, slower.

The two lances

The spray lance gives a flat fan for rinsing paintwork and furniture. The Dirt Blaster spins a point jet in a circle and is the one for stone, moss and the green line along a path. Both are in the box; nothing else is needed to start.

The hose

Three metres of high-pressure hose, against 6 on the K 4 Classic and 8 on the K 4 Power Control. With a car you move the machine once or twice; with a fence you move it every couple of panels. The 3.4 kg body makes that easy, but it is the most noticeable economy in the design.

The motor

1.4 kW and air-cooled. Kärcher’s water-cooled motors, on the K 4 Power Control and the K 4 WCM, are for frequent, long sessions. For a few washes a year, air cooling is what you need and part of why the K 2 is small and light.

Size

3.4 kg without accessories, the lightest on our pressure-washer shortlist, and small enough for a hall cupboard or a car boot. For a flat with a balcony or a terraced house with a yard, storage often decides the purchase before pressure does.

Strengths

  • 3.4 kg and small enough for a cupboard
  • Dirt Blaster lance included
  • The cheapest Kärcher

Limitations

  • 3 m hose
  • Air-cooled motor, for occasional use
  • Half the area per hour of a K 4

Good for

  • a flat, a car, a small paved yard

Look elsewhere if

  • a large patio or a driveway

Who should buy it

Someone with a car, bikes and garden furniture to clean a few times a year, a balcony or a small yard, and little room to store anything bigger.

Who should not

Anyone with a large patio, a block-paved drive or decking to clean every spring, who wants the K 4 Classic or the Bosch UniversalAquatak 135; and anyone who wants to clean for an hour every week, which wants a water-cooled K 4.

Sources

Facts checked 11 November 2026

  1. Kärcher UK — K 2 Classic product page — Manufacturer documentation, checked 23 October 2026
  2. Retail listing (KÄRCHER) — Retailer listing, checked 23 October 2026
Is 110 bar enough for a patio?

For a small one, with the Dirt Blaster and patience. Kärcher rates the K 2 at 20 square metres an hour against 30 for the K 4 Classic, so a patio that takes the K 4 an hour takes the K 2 an hour and a half. For a large patio or a driveway, the K 4's extra pressure and flow pay for themselves in time.

What is the Dirt Blaster?

Kärcher's rotating point-jet lance. It spins a narrow jet in a circle, which gives the cutting power of a point jet over a wider patch. It is the lance for moss in paving joints and grime on stone; the standard spray lance is for cars, bikes and furniture.

Is the 3 m hose a problem?

It means moving the machine more often. The K 2 is light at 3.4 kg, so carrying it along a car or a fence is easy, but the 3 m high-pressure hose is half the length of the K 4 Classic's and a third of the K 4 Power Control's.

Can I use it every week?

Kärcher's K 2 has an air-cooled motor, which suits occasional use: a car at the weekend, a spring clean. The water-cooled motors in the dearer K 4 models are built for longer, more frequent sessions.

Comparison · Garden

Kärcher K 4 Classic vs Bosch UniversalAquatak 135: the two mid-size pressure washers, on bar, litres and hose

Two air-cooled washers at the same point in the market: Kärcher's plain K 4 with 130 bar, 420 litres an hour and two lances, and Bosch's UniversalAquatak with 135 bar, 450 litres an hour and one nozzle that twists between three jets. Which one suits a patio and a car comes down to flow, hose length, weight and whether you want to swap lances or twist a nozzle.

Updated 23 October 2026