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.
KV6-series family: 20K4N, 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 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.
Frequently asked questions about the Rover 25K4N
How much power does the Rover 25K4N make?
The Rover 25K4N develops 150 - 190 hp and 220 - 245 Nm of torque.
How much oil does the Rover 25K4N take and which one?
Engine oil capacity: 5.2 liters. Recommended oil: 5W-30.
Does the Rover 25K4N have a timing belt or chain?
The Rover 25K4N uses a timing belt.
Is the Rover 25K4N turbocharged?
No, the Rover 25K4N is naturally aspirated.
Does the Rover 25K4N need valve clearance adjustment?
No, the Rover 25K4N has hydraulic lifters, so the valve clearances do not need to be adjusted.
How long does the Rover 25K4N last?
The typical lifespan of the Rover 25K4N is ~250 000 km with proper maintenance.
What is the fuel consumption of the Rover 25K4N?
Rover 75 2000: city 16.9, highway 8.6, combined 11.6 L/100 km.
What cars was the Rover 25K4N 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.
What are the common problems of the Rover 25K4N?
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. All known problems.
What engines are related to the Rover 25K4N?
KV6-series family: 20K4N.
