From 1996 to 2006, the 2.5-liter Rover KV6 25K4N engine was manufactured in Korea and England and fitted to the models 75, 825, Land Rover Freelander, and Kia Carnival under the K5 index. After being released in Britain, it was assembled in China for an additional ten years under the name NV6.
KV6-series engines: 20K4N and 25K4N.
Specifications
| 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 |
16.9 8.6 11.6 |
| 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 engine has wet liners, which can easily sag when overheated;
Antifreeze seeps into the oil when the liners sag, necessitating a costly overhaul;
This complicated three-belt timing makes it simple to harm the camshafts during replacement;
Additionally, the engine power abruptly decreases and the intake manifold dampers are frequently wedged;
The pump, thermostat, and cooling fan are the motor’s weak points.