Without the Kärcher K4 I had no way to clean the patio, while washing the car was a process of using my garden hose along with buckets of soapy water and a dump truck load of elbow grease.

Here we've picked two popular models in Kärcher's pressure washer range, the mid-range Kärcher K4 and the high-end Kärcher K7. We're comparing their features and performance so that ...