The Isuzu MU-X II 1.9 Ddi (150 hp) Rev Tronic is a diesel-powered sport utility vehicle (SUV) produced by Isuzu from October 2020 to 2024. This variant occupied a key position in the second generation MU-X lineup, serving as the entry-level engine option in many markets, particularly those outside of Australia where the 3.0-liter engine was more prevalent. Built on the Isuzu D-Max platform, the MU-X II aimed to provide a comfortable and capable seven-seater SUV, blending off-road potential with family-friendly practicality. The 1.9-liter engine and Rev Tronic automatic transmission combination was designed to offer a balance of fuel efficiency and usability for everyday driving.
Technical Specifications
| Brand | Isuzu |
| Model | MU-X |
| Generation | MU-X II |
| Type (Engine) | 1.9 Ddi (150 Hp) Rev Tronic |
| Start of production | October, 2020 |
| End of production | 2024 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SUV |
| Seats | 7 |
| Doors | 5 |
| Fuel Type | Diesel |
| Weight-to-power ratio | 13 kg/Hp, 76.9 Hp/tonne |
| Weight-to-torque ratio | 5.6 kg/Nm, 179.5 Nm/tonne |
| Power | 150 Hp @ 3600 rpm |
| Power per litre | 79 Hp/l |
| Torque | 350 Nm @ 1800-2600 rpm (258.15 lb.-ft. @ 1800-2600 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | RZ4E-TC |
| Engine displacement | 1898 cm3 (115.82 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 80 mm (3.15 in.) |
| Piston Stroke | 94.4 mm (3.72 in.) |
| Compression ratio | 16.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 6.6 l (6.97 US qt | 5.81 UK qt) |
| Coolant | 11.1 l (11.73 US qt | 9.77 UK qt) |
| Kerb Weight | 1950-2005 kg (4299.01 – 4420.27 lbs.) |
| Fuel tank capacity | 80 l (21.13 US gal | 17.6 UK gal) |
| Length | 4850 mm (190.94 in.) |
| Width | 1870 mm (73.62 in.) |
| Height | 1815-1875 mm (71.46 – 73.82 in.) |
| Wheelbase | 2855 mm (112.4 in.) |
| Front track | 1570 mm (61.81 in.) |
| Rear (Back) track | 1570 mm (61.81 in.) |
| Ride height (ground clearance) | 230-235 mm (9.06 – 9.25 in.) |
| Minimum turning circle (turning diameter) | 11.2 m (36.75 ft.) |
| Drivetrain Architecture | Rear wheel drive |
| Number of gears and type of gearbox | 6 gears, automatic transmission Rev Tronic |
| Front suspension | Double wishbone |
| Rear suspension | Independent multi-link suspension |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 255/65 R17; 265/60 R18; 265/50 R20 |
| Wheel rims size | 7.0J x 17; 7.5J x 18; 7.5J x 20 |
Powertrain & Engine Architecture
The heart of the MU-X II 1.9 Ddi is the RZ4E-TC engine, a 1.9-liter inline-four cylinder diesel. This engine is a member of Isuzu’s Ddi (Direct Diesel Injection) family, utilizing a common-rail direct injection system for precise fuel delivery. The RZ4E-TC features a single turbocharger with an intercooler, boosting power output to 150 horsepower at 3600 rpm and 350 Nm (258 lb-ft) of torque between 1800 and 2600 rpm. The engine employs a double overhead camshaft (DOHC) valvetrain with four valves per cylinder, contributing to efficient combustion and power delivery. The ‘Rev Tronic’ automatic transmission is a six-speed unit designed for smooth shifting and optimized fuel economy. It’s a conventional torque converter automatic, prioritizing comfort and ease of use over outright performance.
Driving Characteristics
The 1.9-liter engine paired with the Rev Tronic automatic transmission delivers a comfortable, if not particularly sporty, driving experience. Acceleration is adequate for everyday driving, but the MU-X II 1.9 Ddi doesn’t offer the brisk performance of the larger 3.0-liter engine option. The automatic transmission is tuned for smooth shifts, prioritizing fuel efficiency over aggressive downshifts. The gear ratios are optimized for cruising, making it well-suited for highway driving. However, when fully loaded with passengers and cargo, the engine can feel strained, particularly when climbing hills. Compared to manual transmission versions, the automatic offers less driver control and slightly reduced fuel economy. The weight of the vehicle, combined with the engine’s output, results in a weight-to-power ratio of 13 kg/hp.
Equipment & Trim Levels
The MU-X II 1.9 Ddi Rev Tronic typically came equipped with a respectable level of standard features. These generally included air conditioning, power windows and locks, a basic audio system with Bluetooth connectivity, and standard safety features like ABS and airbags. Higher trim levels offered upgrades such as leather upholstery, a touchscreen infotainment system with navigation, rear parking sensors, and a reverse camera. Optional extras could include a sunroof, alloy wheels, and advanced driver-assistance systems (ADAS) depending on the market. Interior upholstery was typically cloth on the base models, with leather available on higher trims. Dashboard configurations were generally consistent across the range, with a focus on functionality and ease of use.
Chassis & Braking
The MU-X II utilizes a body-on-frame construction, providing robust durability and off-road capability. The front suspension consists of a double wishbone setup, while the rear features an independent multi-link suspension. This configuration aims to balance ride comfort with handling stability. Braking systems varied depending on the trim level and market. Lower trims often featured disc brakes on the front wheels and drum brakes on the rear, while higher trims typically had disc brakes all around. Stabilizer bars were fitted to both the front and rear axles to reduce body roll during cornering. The steering system is a rack and pinion setup with electric power steering, providing light and responsive steering feel.
Market Reception & Comparison
The Isuzu MU-X II 1.9 Ddi Rev Tronic was generally well-received as a practical and affordable seven-seater SUV. Critics praised its comfortable ride, spacious interior, and fuel efficiency. However, some reviewers noted that the 1.9-liter engine felt underpowered, especially when the vehicle was fully loaded. Compared to the 3.0-liter engine option, the 1.9 Ddi offered better fuel economy but significantly less performance. In terms of reliability, the Isuzu MU-X has a reputation for being a durable and dependable vehicle, and the 1.9-liter engine has proven to be relatively trouble-free. It often competed with vehicles like the Toyota Fortuner, Mitsubishi Pajero Sport, and Ford Everest, offering a compelling value proposition in its segment.
Legacy
The Isuzu MU-X II 1.9 Ddi Rev Tronic has established itself as a reliable and practical SUV in the used car market. The RZ4E-TC engine, while not known for blistering performance, has proven to be durable and relatively easy to maintain. Parts availability is generally good, and the vehicle’s robust construction ensures a long service life. As a used vehicle, the 1.9 Ddi offers a cost-effective option for families seeking a spacious and capable SUV. Its fuel efficiency and relatively low running costs make it an attractive choice for budget-conscious buyers. The Rev Tronic automatic transmission, while not the most advanced, has proven to be dependable and requires minimal maintenance.
