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Kärcher K1800 vs K1900 - The Differences

Further down the page, you'll find some explanations regarding the key similarities and differences between the Kärcher K1900 and the Kärcher K1800.

But before checking out explanations regarding their power, design, and features here's a table that summarizes the main pros of each of these 2 pressure washers:

Kärcher K1900Kärcher K1800
Kärcher K1900Kärcher K1800
  • Induction motor
  • Higher PSI
  • Higher GPM
  • Higher Cleaning Units
  • Bigger soap tank
  • More nozzles
  • Lighter
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As the K1900 and the K1800 are both Kärcher pressure washers, they benefit from the same level of quality and attention to detail.

Power Comparison

  • Fuel: Both units are electric pressure washers.
  • Engine & Pump: The Kärcher K1900 and the Kärcher K1800 both use an axial-type pump to put water under pressure. Two main factors differentiate the motors used in these 2 units. To start with, the Kärcher K1900's pump is powered by a 13-amp motor, while the Kärcher K1800 uses a 14-amp one. But it should also be noted that, while the latter is a standard, universal motor, the former is an induction motor and thus, more energy-efficient, quiet and durable.

The following charts are provided to show you at a glance how the main specs of the Karcher K1900 compare to the Karcher K1800.

  • Pressure: With a maximum reachable pressure of 1900 PSI, the Kärcher K1900 provides a somewhat higher force to blast off dirt and grime than the 1800 PSI of the Kärcher K1800.
  • Water Flow: When operating at low pressure, the K1900 can generate a higher maximum volume of water than the K1800. It can deliver up to 1.3 GPM (gallons per minute), whereas the K1800 offers a maximum water flow of 1.2 GPM. The former should thus allow you to rinse away dirt and debris with better efficiency and speed.
  • Cleaning Power: With its 2470 C.U. (Cleaning Units = PSI x GPM), the Kärcher K1900 offers a higher overall cleaning efficiency than the K1800 and its 2160 C.U.

Design Comparison

  • Design: Both units are constructed with a hand truck design. Therefore, if either of these 2 devices should provide better mobility, it would be due to its wheels and weight (which we detail just below).
  • Weight: Weighing 21.4 lbs, the K1800 is far lighter than the 39.3 lbs of the K1900.
  • Maneuverability: Both products benefit from a set of wheels, which greatly contributes to their maneuverability. Both offer a folding handle, which improves your grip when you wish to move them.

Feature Comparison

  • Soap Addition: Both washers allow for the addition of chemical detergent solutions to the water. Whether you choose the K1900 or the K1800, you'll be able to store your cleaning chemicals in the unit's onboard soap tank. However, as the K1900 can hold 1 gal of cleaning solution, it benefits from a bigger detergent tank than the K1800 and its 0.5 gal tank.
  • Trigger Gun & Wand: Each of these 2 units comes with a fairly standard ergonomic trigger gun and a classic wand.
  • Nozzles: Both pressure washers come with 15°, soap, and turbo nozzles, but the nozzle similarities stop here. The K1900 also has a 40° nozzle.
  • Reach: Both products include a 25 ft high-pressure hose. Therefore, neither of them will, out of the box, allow for a higher freedom of movement around the unit. As both units feature a 35 ft power cord, their maximum allowable placement from an electrical outlet is the same.
  • Storage: The K1900 and K1800 both offer onboard storage that allows you to neatly keep the accessories you need at hand. Both washers feature a set of hooks to help you neatly store their high pressure hoses when not in use.

TL;DR

Kärcher K1900Kärcher K1800
Kärcher K1900Kärcher K1800
  • Induction motor
  • Higher PSI
  • Higher GPM
  • Higher Cleaning Units
  • Bigger soap tank
  • More nozzles
  • Lighter
Show all offers
Show all offers
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