The Isuzu Trooper UBS55, specifically the 2.8 TD variant produced between 1988 and 1991, represents an early foray into the increasingly popular SUV market. Part of the first generation Trooper (UBS), this model aimed to provide a capable and relatively affordable four-wheel-drive vehicle, primarily targeted towards buyers seeking utility and off-road potential. It occupied a middle ground within the UBS lineup, offering a diesel engine option for those prioritizing fuel economy and torque over outright speed, and served as a key model for Isuzu’s expansion into international markets. The UBS series Trooper was a significant vehicle for Isuzu, establishing a foothold in a segment dominated by Japanese and American manufacturers.
Technical Specifications
| Brand | Isuzu |
| Model | Trooper |
| Generation | Trooper (UBS) |
| Type (Engine) | 2.8 TD (UBS55) (106 Hp) |
| Start of production | 1988 |
| End of production | 1991 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SUV |
| Seats | 5 |
| Doors | 5 |
| Fuel Type | Diesel |
| Power | 106 Hp |
| Number of cylinders | 4 |
| Engine aspiration | Turbocharger |
| Drive wheel | All wheel drive (4×4) |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Power steering | Hydraulic Steering |
Powertrain & Engine Architecture
The heart of the UBS55 is Isuzu’s 2.8-liter 4JB1-T diesel engine. This inline-four cylinder engine utilizes a turbocharger to boost power output to 106 horsepower. The 4JB1 engine family is known for its robustness and longevity, a characteristic that contributed to the Trooper’s reputation for reliability. The engine employs indirect injection, a common technology for diesel engines of the era, utilizing a distributor-type fuel injection pump. This system, while not as refined as direct injection, proved durable and relatively easy to maintain. The engine’s valvetrain consists of a single overhead camshaft (SOHC) operating two valves per cylinder. The turbocharger, a Garrett unit in many examples, provides a noticeable increase in torque compared to naturally aspirated versions of the 4JB1. The UBS55 was typically paired with either a 5-speed manual transmission or a 4-speed automatic transmission. The automatic transmission, while offering convenience, was sometimes criticized for its relatively slow shift points and tendency to hunt for gears, particularly under load.
Driving Characteristics
The 2.8 TD UBS55 Trooper delivers a driving experience focused on capability rather than outright performance. The 106 horsepower and approximately 192 lb-ft of torque provide adequate power for everyday driving and moderate off-road excursions. Acceleration is modest, and highway passing requires careful planning. The automatic transmission, while convenient, doesn’t maximize the engine’s potential, resulting in a somewhat sluggish feel. The 4×4 system, typically part-time with selectable 2H, 4H, and 4L modes, provides excellent traction in challenging conditions. The Trooper’s body-on-frame construction contributes to a robust feel, but also results in a less refined ride compared to more modern unibody SUVs. Steering is hydraulic, offering reasonable assistance, but lacks the precision of more contemporary systems. The UBS55’s suspension, consisting of independent front suspension with coil springs and a live axle rear suspension with leaf springs, prioritizes durability and load-carrying capacity over comfort.
Equipment & Trim Levels
The UBS55 Trooper 2.8 TD, in its base form, was relatively sparsely equipped, reflecting its positioning as a value-oriented SUV. Standard features typically included cloth upholstery, manual windows and door locks, and a basic AM/FM radio. Air conditioning was often an optional extra, as were power windows and upgraded audio systems. Interior trim was functional and durable, prioritizing practicality over luxury. The dashboard layout is straightforward, with clearly labeled controls. Higher trim levels, if available in specific markets, might have included features such as alloy wheels, upgraded interior trim, and a sunroof. However, the 2.8 TD variant generally remained focused on providing essential functionality at an affordable price point.
Chassis & Braking
The Isuzu Trooper UBS55 utilizes a traditional body-on-frame construction, providing a solid and durable chassis. The front suspension features independent double wishbones with coil springs, offering a reasonable degree of ride comfort and handling. The rear suspension employs a live axle with leaf springs, designed for load-carrying capacity and durability. Braking duties are handled by ventilated disc brakes on all four wheels, providing adequate stopping power for the vehicle’s weight and intended use. Power steering is standard, making maneuvering easier, particularly at low speeds. The UBS55’s chassis and braking system are designed for robustness and reliability, prioritizing functionality over high-performance characteristics.
Market Reception & Comparison
The Isuzu Trooper UBS55 2.8 TD received generally positive reviews for its off-road capability, durability, and fuel efficiency. Critics praised the 4JB1 diesel engine for its reliability and torque output, making it well-suited for towing and challenging terrain. However, the automatic transmission was often criticized for its sluggish performance. Compared to its competitors, such as the Toyota Land Cruiser and Nissan Patrol, the Trooper offered a more affordable entry point into the mid-size SUV segment. Within the Trooper lineup, the 2.8 TD variant appealed to buyers who prioritized fuel economy and torque over outright speed, contrasting with the gasoline-powered models that offered more horsepower but lower fuel efficiency. The 2.8 TD was often seen as a practical choice for those needing a capable and reliable vehicle for work or outdoor adventures.
Legacy
The Isuzu Trooper UBS55 2.8 TD has developed a reputation as a durable and reliable vehicle, particularly among enthusiasts and those seeking a capable off-road machine. The 4JB1 diesel engine is highly regarded for its longevity, and well-maintained examples can still be found in service today. While the automatic transmission can be a weak point, manual transmission versions are particularly sought after. In the used car market, the UBS55 2.8 TD represents a relatively affordable option for those seeking a classic SUV with proven off-road credentials. Parts availability can be a challenge in some regions, but the engine’s simplicity and durability contribute to its continued appeal. The UBS55 laid the foundation for the Trooper’s success, establishing Isuzu as a credible player in the competitive SUV market.
