Engine Rover 25K4N

The 2.5-liter Rover KV6 25K4N engine was produced in England and Korea from 1996 to 2006 and installed on models 75, 825, as well as Land Rover Freelander and Kia Carnival under the K5 index. At the end of its release in Britain, it was assembled in China for another ten years, where it was called NV6.

Engines of KV6-series: 20K4N, 25K4N.


Production years 1996-2006
Displacement, cc 2497
Fuel system distributed injection
Power output, hp 150 – 190
Torque output, Nm 220 – 245
Cylinder block aluminum V6
Block head aluminum 24v
Cylinder bore, mm 80
Piston stroke, mm 82.8
Compression ratio 10.5
Features VIS
Hydraulic lifters yes
Timing drive belt
Phase regulator no
Turbocharging no
Recommended engine oil 5W-30
Engine oil capacity, liter 5.2
Fuel type petrol
Euro standards EURO 2/3
Fuel consumption, L/100 km (for Rover 75 2000)
— city
— highway
— combined
Engine lifespan, km ~250 000
Weight, kg 179.5

The engine was installed on:

  • Rover 75 I (RJ) in 1998 – 2005;
  • Rover 800 I (XS) in 1996 – 1999;
  • MG ZT in 2001 – 2005;
  • Land Rover Freelander 1 (L314) in 2000 – 2006;
  • Kia Carnival 1 (GQ) in 1998 – 2005;
  • Kia Sedona GQ in 2001 – 2005.

Disadvantages of the Rover 25K4N engine

  • This is an engine with wet liners, which, if overheated, can simply sag;
  • When the liners sag, the antifreeze gets into the oil and an expensive overhaul awaits you;
  • Here is a complex timing of three belts and when replacing it, it is easy to damage the camshafts;
  • Also, the dampers in the intake manifold are often wedged and the engine power drops sharply;
  • The weak points of the motor include the pump, thermostat, cooling fan.

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