Kärcher K4 vs. Kärcher K2: which pressure washer is right for you?

Finding the right pressure washer for you is important, so we've compared the fantastic Kärcher K4 and Kärcher K2

Karcher K2 vs Karcher K4
(Image credit: Karcher)

Anyone who has ever had the misfortune of cleaning a dirty driveway, car, or other outside space knows one thing for sure: pressure washers are the tool for the job. We've been testing many different versions to find the best pressure washers and the Kärcher K4 and Kärcher K2 consistently ranked at the top.

Now that we're coming out of a very grim winter into spring, cleaning your house and vehicle are likely to be a top priority. Doing so by hand or paying someone else to do the job are options, but we personally prefer the quicker, easier method of using a pressure washer.

In our testing, one brand clearly stood out: Kärcher, founded in Germany, makes some of the best and most reliable pressure washes on the market, from the high-end Kärcher K7 to the fantastic mid-range Kärcher K4 to the budget Kärcher K2 and everything in between. Other brands exist, of course, but Kärcher is the most consistent in our testing. 

T3 has spent hours testing a range of different garden equipment to find the best pressure washers, the best cordless lawnmowers, the best garden hose, and many more. With spring finally here, there's never been a better time to invest in – or upgrade – your garden hardware. 

Let's jump into our Kärcher K4 vs. Kärcher K2 best pressure washer comparison. 

Karcher K4

(Image credit: Karcher)

Kärcher K4 vs. Kärcher K2: which has more power?

The first thing we need to say is that if you know for certain that you need loads and loads of power, the Kärcher K7 is the machine for you, offering 180 bar of pressure at its peak, easily powerful enough to strip away even tough dirt. For less intensive tasks, though, the K2 and K4 will be plenty powerful. 

The K4 offers 130 bar of pressure at its most powerful while the K2 offers 110 bar, both of which are respectable offerings. The K4 is rated as having a maximum flow rate of 420 while the K2 has a flow rate of 360 at its peak. 

Both of these will be comfortably capable of cleaning most surfaces and will work well in more delicate areas, like older cars or nice paving. 

Karcher K2

(Image credit: Karcher)

Kärcher K4 vs. Kärcher K2: portability and hoses

For most people, being able to actually move the pressure washer around is really important; there's no point getting something so big and powerful that you spend your days hefting it from location to location. 

The K4 and K2 are ideal for situations where you need portability: the K4 weighs in at a very respectable 11.4kg without accessories while the K2 comes in at 4.3kg. There's also a compact version of the K2 that weighs just 3.7kg, if that's your thing.

Both the K2 and K4 come with 6 meter hoses as standard and both lack built-in hose reels, something the K7 includes. 

Kärcher K4 vs Kärcher K7

(Image credit: Kärcher)

Kärcher K4 vs. Kärcher K2: the winner is...

The differences between the Kärcher K4 and Kärcher K2 are fairly small: both are available for good prices, both have decent water pressure, the same length of hose, a huge variety of attachments and accessories, and so on. 

Of the two, we recommend the K4 if you can spare the extra cash just because it's a more comprehensive machine but there is absolutely nothing wrong with the K2. If you can find a good deal on either, you won't be making a mistake.

Max Slater-Robins has written for T3 now on and off for over half a decade, with him fitting in serious study at university in between. Max is a tech expert and as such you'll find his words throughout T3.com, appearing in everything from reviews and features, to news and deals. Max is specifically a veteran when it comes round to deal hunting, with him seeing out multiple Black Friday campaigns to date.