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Karcher vs Bosch Pressure Washers

Karcher K4 cleaning decking

So you’ve decided to join the pressure washer club – Welcome aboard! But now you have a new problem, shopping for the right pressure washer, and that starts with which brand to choose. Picking a well-reputed and reliable brand at the outset will mean you get a machine with superb, long-lasting performance, backup up with dependable customer support.

In terms of the choices available in the UK, Karcher and Bosch are the main players who offer some excellent pressure washers that will tackle the toughest outdoor cleaning on a wide variety of surfaces.

Despite the similarities, these leading pressure washer brands have some distinct differences between their top machines. Before deciding on which one you want to finalise on, you must know what sets them apart from each other.

Kärcher Pressure Washer K7

Related: Best Electric Pressure Washers List

The Karcher K7 Premium Smart Control Home pressure washer is their top of the line flagship machine. It’s a robust German-engineered machine packed with features – from car cleaning to stone walls, it has the accessories and power for them all.

This model of pressure washer is accompanied by a home kit containing a T7 patio cleaner and stone and facade detergent, making it one of the most versatile machines around.

The best part of this pressure washer is its ease of use via the LCD settings displayed on the lance. Whether you want to undertake car paintwork or want to get rid of patio grime, you will breeze through the tasks thanks to the Kärcher K7 Premium Smart Control Home pressure washer.

It comes with a detailed user manual for you to refer to should you feel stuck at any point. One of the defining features is that it is equipped with smart technology. This essentially means that it offers the avenue of Bluetooth connection making your work easy and fun.

It offers a technical flow rate of a maximum of 550 litres/hour and has a power rating of 2.8 kW. Its weight unpackaged stands at just over 17kg, which is fairly heavy to move around, although weight is not an issue since the Karcher K7 is mounted on sturdy wheels, making it easy to move.

Plus, with the lengthy 10m high-pressure hose, the only thing you’ll need to move around during cleaning is the lightweight lance, and the hose stores away neatly on a reel, mounted on the back of the machine – no tripping over messy hoses, just reel out as much as you need.

The accompanying accessories include foam jet, brushes, tap adaptors, spray lances and trigger guns, depending on the package, and Karcher has a further range of accessories you can buy separately.

One feature that the Karcher has that you won’t find on the Bosch pressure washer is the “Smart Control”. This allows you the connect the pressure washer to your smartphone via Bluetooth and control wash settings on an app. This app provides detailed cleaning tips and instructions on how to use the K7 optimally so that you’re able to get the most out of your new machine.

The Karcher K7 does it all – with reliable power and precision – cars, driveways, decking, walls, bikes, whatever needs cleaning in the garden.

Bosch AdvancedAquatak 140 Pressure Washer

Bosch pressure washer electric

Bosch – also a premium German brand – offers the AdvancedAquatak 140 to compete with the K7 with its Quad pump technology which makes this pressure washer extremely efficient. It is robust and comes with outstanding power ensuring you don’t spend a lot of time on your challenging tasks.

The AdvancedAquatak 140 is equipped with an 8m high-pressure hose reel (2m less than the K9) which ensures a high supply of water over a wide distance. Its durable 550 ml nozzles are an added attraction that makes this pressure washer one of a kind.

Some of the distinct features of the AdvancedAquatak 140 include a flow rate of 450 litres/hour (less than the Karcher) and a power rating of 2.6 kW. The available accessories include a large water filter, wash brush, self-priming kit and drain cleaner among others.

The AdvancedAquatak 140 is a high-performing pressure washer that works wonders on a range of surfaces and is equally efficient in cleaning bikes or scooters and outdoor furniture. Its large wheels and a telescopic handle carved in metal make it extremely mobile and easy to use.

Karcher or Bosch: What’s the Verdict?

Both the Karcher and Bosch pressure washer have a 5m power cord, and their overall features are very similar – although the Karcher takes the lead on most. However, the Bosch 140 is around half the price of the K7, and cleaning results between the two are negligible.

If you’re looking for value for money, we recommend the Bosch 140. If you’re looking to go all-out on the very best and have money to burn, we recommend the Karcher.

It is clear from the description above that both the Karcher and Bosch pressure washers are great at tackling tough jobs, are easy to use, built by word leading German engineers, and look the part. But no one triumphs over the other, as they can achieve much the same end results, even with Bosch falling slightly short on some specifications compared with the Karcher K7.

To make the best choice, you need to decide based on your needs and the factors that differentiate the two.

Value for Money

The Kärcher K7 Premium Smart Control Home is much more expensive than the AdvancedAquatak 140. It also comes with many more accessories at the same price point.

If you are looking to spend a substantial amount of money, you can go for more premium options in Bosch for the same price that you would be spending on the Kärcher K7 Premium Smart Control Home pressure washer.


One of the key differences between the above models is their weight. Bosch pressure washer is lighter than the Kärcher K7 Premium Smart Control Home pressure washer.

The latter also looks larger than Bosch. If you are one of those who prefer compact pressure washers, you will be much better off with Bosch.


If you need as much power as possible, then the K7 wins. The Karcher K7 has 180 bar and the Bosch 140 has, you guessed it… 140 bar, giving the K7 a solid 40 bar more pressure over its competitor.

If you have a lot of first stonework or want to buy a pressure washer for a cleaning business like a mobile car wash or driveway cleaning, then the extra kick from the K7 would be a nice advantage.


As mentioned, both the Karcher and Bosch pressure washers discussed are built by leading German engineering companies. And of course, the Germans are known for their manufacturing reliability, especially when it comes to machinery. Both of these pressure washers are built to the highest standard and built to last. There are no flaws in build quality between the two, and therefore no one scores better than the other in the reliability department.


One of the key things users look for in an electrical appliance is the warranty period. Sure, technology has made life easier, but you don’t know just when it might fail you.

Kärcher is way more generous when it comes to warranty. It offers a period of five years as opposed to Bosch’s two-year warranty.

Though both Kärcher K7 Premium Smart Control Home and AdvancedAquatak 160 are great pressure washers adept at undertaking a range of tasks, there are marked differences between the two.

The biggest differentiating factor between the two is price and warranty. Hence, it comes down to how much you want to spend and what are your priorities for your pressure washer. Either won’t disappoint.