The MG ZT 2.5 V6 Automatic, produced during the 2004-2005 model years, represented a flagship offering within the facelifted ZT range. Positioned as a premium sedan, it aimed to blend British styling with a capable V6 powertrain. The ZT itself was based on the Rover 75 platform (internally designated X20), a vehicle developed under BMW ownership. The 2004 facelift brought subtle styling revisions and aimed to refresh the model’s appeal. This 2.5 V6 Automatic variant was the top-tier engine option available, offering a more refined and powerful experience compared to the four-cylinder models. It was primarily marketed in the United Kingdom and Europe, representing a final attempt by MG Rover to compete in the executive car segment.
Technical Specifications
| Brand | MG |
| Model | ZT |
| Generation | ZT (facelift 2004) |
| Type (Engine) | 2.5 V6 (177 Hp) Automatic |
| Start of production | 2004 |
| End of production | 2005 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 16 l/100 km (14.7 US mpg, 17.7 UK mpg, 6.3 km/l) |
| Fuel consumption (extra urban) | 7.9 l/100 km (29.8 US mpg, 35.8 UK mpg, 12.7 km/l) |
| Fuel consumption (combined) | 10.9 l/100 km (21.6 US mpg, 25.9 UK mpg, 9.2 km/l) |
| CO2 emissions | 259 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 9 sec |
| Acceleration 0 – 62 mph | 9 sec |
| Acceleration 0 – 60 mph | 8.9 sec |
| Maximum speed | 215 km/h (133.59 mph) |
| Emission standard | Euro 3 |
| Weight-to-power ratio | 8.6 kg/Hp, 116.4 Hp/tonne |
| Weight-to-torque ratio | 6.3 kg/Nm, 157.9 Nm/tonne |
| Power | 177 Hp @ 6500 rpm |
| Power per litre | 70.9 Hp/l |
| Torque | 240 Nm @ 4000 rpm (177.01 lb.-ft. @ 4000 rpm) |
| Maximum engine speed | 6750 rpm |
| Engine layout | Front, Transverse |
| Engine Model/Code | KV6 / 25K4F |
| Engine displacement | 2497 cm3 (152.38 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Cylinder Bore | 80 mm (3.15 in.) |
| Piston Stroke | 82.6 mm (3.25 in.) |
| Compression ratio | 10.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC |
| Engine oil capacity | 5.2 l (5.49 US qt | 4.58 UK qt) |
| Coolant | 7.5 l (7.93 US qt | 6.6 UK qt) |
| Kerb Weight | 1520-1660 kg (3351.03 – 3659.67 lbs.) |
| Max. weight | 2030 kg (4475.38 lbs.) |
| Max load | 370-510 kg (815.71 – 1124.36 lbs.) |
| Trunk (boot) space – minimum | 432 l (15.26 cu. ft.) |
| Trunk (boot) space – maximum | 674 l (23.8 cu. ft.) |
| Fuel tank capacity | 65 l (17.17 US gal | 14.3 UK gal) |
| Max. roof load | 80 kg (176.37 lbs.) |
| Permitted trailer load with brakes (12%) | 1600 kg (3527.4 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 100 kg (220.46 lbs.) |
| Length | 4747 mm (186.89 in.) |
| Width | 1778 mm (70 in.) |
| Height | 1417 mm (55.79 in.) |
| Wheelbase | 2746 mm (108.11 in.) |
| Minimum turning circle | 11.36 m (37.27 ft.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the front wheels of the vehicle. |
| Drive wheel | Front wheel drive |
| Number of gears and type of gearbox | 5 gears, automatic transmission |
| Front suspension | Independent, type McPherson with coil spring and anti-roll bar |
| Rear suspension | Independent multi-link spring suspension with stabilizer |
| Front brakes | Ventilated discs, 284 mm |
| Rear brakes | Ventilated discs, 276 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
| Tires size | 225/45 R18 |
| Wheel rims size | 7.5J x 18 |
Powertrain & Engine Architecture
The heart of the ZT 2.5 V6 Automatic is the KV6 engine, a 2.5-liter naturally aspirated V6. This engine, designated 25K4F, was originally developed by Honda in collaboration with Rover. It features a 60-degree V-angle and a cast iron block with aluminum cylinder heads. The engine utilizes multi-port fuel injection and a double overhead camshaft (DOHC) valvetrain with four valves per cylinder. The KV6 is known for its relatively smooth operation and distinctive exhaust note. Paired with the engine is a Jatco-sourced 5-speed automatic transmission. This transmission was chosen for its refinement and ease of use, catering to the target audience seeking a comfortable driving experience. While not a performance-oriented gearbox, it provided smooth shifts and adequate response for everyday driving.
Driving Characteristics
The 2.5 V6 Automatic ZT offered a noticeable step up in performance compared to the four-cylinder variants. With 177 horsepower and 240 Nm (177 lb-ft) of torque, it could accelerate from 0 to 60 mph in around 8.9 seconds and reach a top speed of 133.59 mph. However, the automatic transmission did slightly diminish the engine’s potential, as a manual transmission would have delivered quicker acceleration. The gear ratios were tuned for comfort and fuel economy rather than outright performance. The car felt relaxed and capable on the highway, with sufficient power for overtaking maneuvers. In city driving, the automatic transmission made for a smooth and effortless experience, but the engine’s fuel consumption was relatively high.
Equipment & Trim Levels
The 2.5 V6 Automatic typically came with a generous level of standard equipment. This included leather upholstery, climate control, electric windows and mirrors, a CD stereo system, and alloy wheels. Optional extras included a sunroof, upgraded audio system, and parking sensors. The interior design was generally well-appointed, reflecting the ZT’s positioning as a premium sedan. The dashboard layout was functional and user-friendly, although the materials used were not always of the highest quality. The ZT aimed to provide a comfortable and refined interior environment.
Chassis & Braking
The ZT utilized a McPherson strut front suspension and a multi-link rear suspension, providing a comfortable ride quality. Stabilizer bars were fitted to both axles to reduce body roll during cornering. Braking duties were handled by ventilated discs on all four wheels, supplemented by an Anti-lock Braking System (ABS). The braking performance was adequate for the car’s weight and performance level. The steering was hydraulic power-assisted, providing a reasonably direct and responsive feel.
Market Reception & Comparison
The MG ZT 2.5 V6 Automatic received mixed reviews from automotive critics. While the engine was praised for its smoothness and refinement, the automatic transmission was sometimes criticized for being somewhat sluggish. Fuel economy was also a concern, with the ZT consuming significantly more fuel than its competitors. Compared to other V6-powered sedans in the same price range, such as the Ford Mondeo or Vauxhall/Opel Vectra, the ZT offered a more distinctive character and a more luxurious interior, but it lacked the brand recognition and established reputation of its rivals. The 1.8L and 2.0L models offered better fuel economy and were more affordable, appealing to a wider range of buyers. The 1.9 TDI diesel offered superior fuel efficiency and torque, making it a popular choice for high-mileage drivers.
Legacy
The MG ZT 2.5 V6 Automatic, along with the rest of the MG Rover range, ultimately fell victim to the company’s financial difficulties and collapse in 2005. Today, surviving examples are relatively rare and are sought after by enthusiasts. The KV6 engine is generally considered to be a reliable unit, although regular maintenance is essential. Common issues include oil leaks and occasional problems with the throttle body. The automatic transmission is also generally reliable, but it can be expensive to repair if it fails. The ZT 2.5 V6 Automatic represents a final chapter in British automotive history and a testament to the engineering capabilities of MG Rover.
