1991 Isuzu Bighorn 3.1DT BASIC Specs

OVERVIEW

With a fuel consumption of 39.2 mpg US - 47 mpg UK - 6.0 L/100km, a weight of 4144 lbs (1880 kg), the Isuzu Bighorn 3.1DT BASIC has a water cooling 4 cylinder engine, a Light oil engine 4JG2. This engine 4JG2 produces a maximum power of 126.7 PS (125 bhp - 93.2 kW) at 3600 rpm and a maximum torque of 274.5 Nm (202.5 lb.ft - 28 kg.m) at 2000 rpm. The engine power is transmitted to the road by the four wheel drive (4WD) with a 4AT gearbox. For stopping power, the Isuzu Bighorn 3.1DT BASIC braking system includes Ventilated disk at the rear and Ventilated disk at the front. Stock tire sizes are 245/70 on 16 inch rims at the rear and 245/70 on 16 inch rims at the front. Chassis details - Isuzu Bighorn 3.1DT BASIC has 4 link type coil spring rear suspension and double wishbone torsion bar spring front suspension for road holding and ride confort.

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By Brian Wong, Reviewed by: Kurt Niebuhr, Updated on April 18, 2024

Overview of the Isuzu Bighorn 3.1DT BASIC

The Isuzu Bighorn 3.1DT BASIC, produced from December 1991 to February 1992, is a rugged and capable SUV designed to tackle various terrains with its 4WD drivetrain. This SUV stands out with its practicality and reliable performance.

Under the hood, the Isuzu Bighorn 3.1DT BASIC boasts a powerful 3.1-liter 4JG2 engine, generating 126.7 PS (125 bhp) of maximum power at 3600 rpm and a torque of 274.5 Nm (202.5 lb.ft) at 2000 rpm. The engine is water-cooled and equipped with a charger, ensuring efficient power delivery.

In terms of size, the Isuzu Bighorn 3.1DT BASIC measures 423 cm (166.53 inches) in length, 174.5 cm (68.7 inches) in width, and 183.5 cm (72.24 inches) in height. The spacious interior provides comfortable seating for four passengers, and the vehicle weighs 1880 kg (4144 lbs).

The 4AT (4-speed automatic) transmission allows smooth gear shifts, enhancing the driving experience. Additionally, the SUV's fuel tank has a capacity of 22.4 US gallons (85 liters), ensuring long-distance travel without frequent refueling.

The Isuzu Bighorn 3.1DT BASIC features a front suspension with double wishbone torsion bar spring and a rear suspension with a 4-link type coil spring, providing a stable and controlled ride on various surfaces. The SUV's ride height stands at 21.5 cm (8.46 inches), offering good ground clearance.

For off-road enthusiasts, the Isuzu Bighorn 3.1DT BASIC comes with standard cornering lamps, ensuring clear visibility during night drives. The exterior design is complemented by standard aluminum disks and 245/70 R16 tires.

Inside the SUV, practical amenities include standard power steering and a tachometer. The centralized door lock provides convenience and security, while the standard removable seats add versatility to the cargo space.

Safety features of the Isuzu Bighorn 3.1DT BASIC include standard 3-point safety belts and child car restraints. Although there are no airbags, the sturdy frame adds an extra layer of safety.

Overall, the Isuzu Bighorn 3.1DT BASIC is a reliable and practical SUV, ideal for those seeking a capable vehicle for both daily commutes and off-road adventures. Its robust engine, spacious interior, and decent fuel efficiency make it a worthy choice for SUV enthusiasts.

Engine Specifications and Details

The heart of the 1991-1992 Isuzu Bighorn 3.1DT BASIC lies in its impressive engine, providing the power and performance required for various driving conditions. This SUV is equipped with a 3.1-liter 4JG2 engine, a water-cooled 4-cylinder powertrain known for its reliability and efficiency.

The 4JG2 engine delivers a maximum power output of 126.7 PS (125 bhp) at 3600 rpm, generating a torque of 274.5 Nm (202.5 lb.ft) at 2000 rpm. Thanks to its charger, the engine offers efficient and responsive acceleration, making it suitable for both city driving and off-road adventures.

The Isuzu Bighorn 3.1DT BASIC's engine features a bore size of 9.5 cm (3.74 inches) and a stroke size of 10.7 cm (4.21 inches). With a compression ratio of 20, the engine achieves a good balance between power and fuel efficiency.

One of the notable advantages of the 4JG2 engine is its fuel economy. The Isuzu Bighorn 3.1DT BASIC offers a fuel consumption rate of 39.2 mpg US (47 mpg UK) or 6.0 L/100km in the 60 km/h mode, making it an economical choice for long journeys.

The engine is paired with a 4-speed automatic transmission (4AT), enabling smooth and seamless gear changes. This transmission setup enhances the overall driving experience and ensures optimal performance across various driving conditions.

The Isuzu Bighorn 3.1DT BASIC is powered by light oil, offering efficient combustion and reduced emissions. This fuel type is widely available, contributing to the SUV's practicality as a daily driver and an adventure companion.

With its impressive engine specifications and fuel efficiency, the 1991-1992 Isuzu Bighorn 3.1DT BASIC remains a reliable and capable SUV that meets the demands of both urban commuting and off-road exploration.

Fuel Tank Capacity and Fuel Consumption

The 1991-1992 Isuzu Bighorn 3.1DT BASIC comes equipped with a sizable fuel tank, providing ample capacity for long-distance travel and off-road adventures. The fuel tank has a total capacity of 22.4 US gallons (85 liters) or 18.6 UK gallons.

When it comes to fuel consumption, the Isuzu Bighorn 3.1DT BASIC showcases its efficiency with impressive fuel economy figures. In the 60 km/h mode, the SUV achieves a fuel consumption rate of approximately 39.2 mpg US (47 mpg UK) or 6.0 L/100km. This level of fuel efficiency ensures that drivers can cover considerable distances without the need for frequent refueling stops.

The combination of a substantial fuel tank capacity and excellent fuel economy makes the Isuzu Bighorn 3.1DT BASIC a reliable and practical choice for extended journeys, allowing drivers to explore various terrains without worrying about running out of fuel. Whether it's daily commuting or venturing off the beaten path, this SUV delivers both performance and efficiency.

Fuel Efficiency (MPG) of the Isuzu Bighorn

The 1991-1992 Isuzu Bighorn 3.1DT BASIC boasts impressive fuel efficiency, making it an economical and practical choice for drivers seeking a balance between performance and cost-effectiveness.

With its 3.1-liter 4JG2 engine, the Isuzu Bighorn 3.1DT BASIC delivers an excellent fuel consumption rate of approximately 39.2 mpg US (47 mpg UK) or 6.0 L/100km in the 60 km/h mode. This level of fuel efficiency is commendable for an SUV of its size and capability, allowing drivers to cover long distances with fewer refueling stops.

The vehicle's efficient fuel consumption is attributed to the well-designed 4JG2 engine, which incorporates a charger and achieves a compression ratio of 20. This combination ensures optimal combustion and fuel utilization, maximizing the SUV's fuel economy.

Thanks to its thoughtful engineering and aerodynamic design, the Isuzu Bighorn 3.1DT BASIC offers not only a smooth and comfortable ride but also an economical one. Whether navigating through city traffic or exploring off-road trails, drivers can be confident in the vehicle's ability to provide efficient performance and cost-effective fuel consumption.

Overall, the Isuzu Bighorn 3.1DT BASIC stands out as a practical and fuel-efficient SUV, catering to drivers who value both power and economical operation in their daily commutes and adventures.

Dimensions and Sizes of the Vehicle

The 1991-1992 Isuzu Bighorn 3.1DT BASIC boasts a sturdy and spacious design, providing ample room for both passengers and cargo. With its SUV body type, it offers practicality and versatility for various purposes.

The exterior dimensions of the Isuzu Bighorn 3.1DT BASIC include a length of 423 cm (166.53 inches), a width of 174.5 cm (68.7 inches), and a height of 183.5 cm (72.24 inches). These dimensions contribute to the SUV's commanding presence on the road and its ability to navigate through different environments.

Inside the vehicle, passengers can enjoy a comfortable cabin space with generous interior dimensions. The interior length measures 168.5 cm (66.33 inches), providing ample legroom for all occupants. The interior width spans 145 cm (57.08 inches), offering sufficient shoulder room for a relaxed seating experience. Moreover, the interior height reaches 119 cm (46.85 inches), ensuring ample headspace for passengers of various heights.

The Isuzu Bighorn 3.1DT BASIC accommodates up to four passengers with its four seats configuration. The spacious cabin and well-designed seating layout make it an ideal choice for family outings and group adventures.

With a wheelbase of 233 cm (91.73 inches), the Isuzu Bighorn 3.1DT BASIC offers stable handling and a smooth ride on various road surfaces. The front and rear axle lengths measure 145.5 cm (57.28 inches) and 146 cm (57.48 inches), respectively, contributing to the SUV's balanced weight distribution and handling capabilities.

The vehicle's ride height, also known as ground clearance, stands at 21.5 cm (8.46 inches), ensuring that the Isuzu Bighorn 3.1DT BASIC can confidently tackle uneven terrains and obstacles.

Overall, the Isuzu Bighorn 3.1DT BASIC's well-thought-out dimensions and sizes contribute to its appeal as a practical and versatile SUV, capable of accommodating passengers and cargo comfortably while navigating through various driving conditions.

Wheel Specifications and Options

The Isuzu Bighorn 3.1DT BASIC for the years 1991-1992 comes with well-engineered wheel specifications, ensuring a smooth and stable driving experience. The SUV features a set of sturdy and capable tires that complement its off-road capabilities.

The front and rear tires of the Isuzu Bighorn 3.1DT BASIC measure 245/70 R16, providing ample traction on various road surfaces and terrains. The 16-inch rims offer a balanced combination of durability and ride comfort, enhancing the SUV's overall performance.

The use of 245/70 R16 tires on the Isuzu Bighorn 3.1DT BASIC adds to its rugged and commanding appearance, making it an ideal vehicle for outdoor enthusiasts and adventurers seeking to explore different landscapes.

Additionally, the vehicle comes with standard aluminum disks, further contributing to the overall stability and safety of the SUV.

Overall, the Isuzu Bighorn 3.1DT BASIC's wheel specifications offer a well-rounded and capable setup, ensuring a confident driving experience both on and off the road. The combination of durable tires, balanced rims, and sturdy aluminum disks makes this SUV a reliable choice for various driving conditions and terrains.

Trim Levels and Generations of 1991-1992 Isuzu Bighorn

The 1991-1992 Isuzu Bighorn 3.1DT BASIC is part of the first generation of Isuzu Bighorn, which ran from 1981 to 1991. This generation marked the initial production of the Bighorn series, establishing its reputation as a robust and capable SUV.

As for the trim levels, the Isuzu Bighorn 3.1DT BASIC stands as one of the available configurations for this generation. The BASIC trim, as the name suggests, focuses on providing essential features and practicality, making it an attractive option for drivers who prioritize functionality over additional amenities.

During this period, Isuzu offered several other trim levels as well, each catering to different customer preferences and needs. These trim levels varied in terms of features, interior options, and exterior enhancements.

The Isuzu Bighorn 3.1DT BASIC, being a 4WD SUV, demonstrated exceptional off-road capabilities and ruggedness. Its 3.1-liter 4JG2 engine, coupled with the 4-speed automatic transmission, delivered reliable power and smooth gear shifts.

While the BASIC trim emphasized simplicity and utility, other trim levels in the 1991-1992 Isuzu Bighorn lineup may have offered additional amenities such as power windows, leather seats, air conditioning, and more advanced audio systems.

With its debut in the early 1980s, the Isuzu Bighorn garnered a loyal following and established itself as a dependable and versatile SUV. The first-generation Isuzu Bighorn laid the foundation for subsequent generations, setting the standard for off-road capabilities and practicality that would continue to evolve in later iterations of the Bighorn series.

Comparing Fuel Average Across Models

When comparing the fuel average across different models of the 1991-1992 Isuzu Bighorn, it becomes evident that the Isuzu Bighorn 3.1DT BASIC stands out for its impressive fuel efficiency. The 3.1DT BASIC model, equipped with a 3.1-liter 4JG2 engine, offers a fuel consumption rate of approximately 39.2 mpg US (47 mpg UK) or 6.0 L/100km in the 60 km/h mode.

While the Isuzu Bighorn 3.1DT BASIC showcases excellent fuel economy, other models in the Bighorn lineup may vary in their fuel consumption rates. Different trim levels, engine options, and transmission choices can influence the fuel efficiency of the Isuzu Bighorn.

Models with larger engine displacements or different transmission configurations may offer slightly different fuel consumption figures. Likewise, additional features and amenities in higher trim levels can contribute to variations in fuel efficiency.

For those seeking an economical and fuel-efficient option, the Isuzu Bighorn 3.1DT BASIC proves to be a practical choice. Its combination of a well-designed engine, aerodynamic body, and efficient drivetrain ensures cost-effective and eco-friendly driving.

However, customers with different priorities, such as desiring more power or enhanced features, may opt for other models in the Isuzu Bighorn lineup. It's essential for potential buyers to consider their specific requirements and driving preferences when selecting the most suitable model from the 1991-1992 Isuzu Bighorn range.

Fuel Capacity for Long Journeys

The 1991-1992 Isuzu Bighorn 3.1DT BASIC comes equipped with a fuel tank that offers ample capacity for long journeys, making it an ideal companion for adventurers and road trips.

With a total fuel capacity of 22.4 US gallons (85 liters), the Isuzu Bighorn 3.1DT BASIC ensures extended driving ranges, reducing the need for frequent refueling stops during long-distance travel.

The SUV's fuel-efficient 3.1-liter 4JG2 engine, combined with the 4-speed automatic transmission, optimizes fuel consumption, allowing drivers to cover considerable distances without sacrificing performance or comfort.

The generous fuel capacity of the Isuzu Bighorn 3.1DT BASIC ensures that drivers can explore various terrains and reach remote destinations without concerns about running out of fuel.

For those who enjoy off-road adventures or extended road trips, the Isuzu Bighorn 3.1DT BASIC's fuel capacity offers peace of mind, enabling drivers to focus on the journey rather than the next fuel station.

Whether navigating through rugged landscapes or cruising on highways, the Isuzu Bighorn 3.1DT BASIC proves to be a reliable and practical choice for long journeys, providing the fuel capacity needed to embark on unforgettable explorations.

Maintenance and MPG Optimization Tips

Proper maintenance is essential to keep the 1991-1992 Isuzu Bighorn 3.1DT BASIC running at its best and ensuring optimal fuel efficiency. Here are some maintenance and MPG optimization tips for this SUV:

1. Regular Engine Tune-Ups: Schedule periodic engine tune-ups to maintain the performance and fuel efficiency of the 3.1-liter 4JG2 engine. Replace spark plugs, air filters, and fuel filters as recommended by the manufacturer.

2. Tire Maintenance: Keep the tires properly inflated to the recommended pressure levels. Underinflated tires can negatively impact fuel efficiency and handling.

3. Check for Leaks: Regularly inspect the vehicle for any signs of fuel or oil leaks. Addressing leaks promptly helps prevent fuel wastage and maintains a clean engine.

4. Fuel Quality: Use high-quality fuel from reputable stations to optimize engine performance and fuel economy.

5. Efficient Driving Habits: Practice smooth and gradual acceleration and avoid aggressive driving. Consistent speeds and minimal braking help improve fuel efficiency.

6. Reduce Idling: Avoid extended idling as it consumes unnecessary fuel. Turn off the engine when parked for extended periods.

7. Regular Oil Changes: Follow the recommended oil change intervals to ensure proper lubrication of engine components.

8. Maintain Proper Alignment: Check and align the wheels regularly to prevent uneven tire wear, which can affect fuel efficiency.

9. Aerodynamic Considerations: Remove roof racks or carriers when not in use to reduce wind resistance and improve aerodynamics.

10. Monitor MPG: Keep track of fuel consumption using the vehicle's trip computer or manually calculating it. This helps identify changes in fuel efficiency and potential issues.

11. Weight Reduction: Remove unnecessary items from the vehicle to reduce weight, which can improve fuel efficiency.

12. Avoid Overloading: Do not exceed the vehicle's maximum load capacity, as it can strain the engine and decrease fuel economy.

By following these maintenance and MPG optimization tips, owners of the Isuzu Bighorn 3.1DT BASIC can enjoy improved fuel efficiency and a well-maintained vehicle for their journeys, both on and off the road.

Engine Performance and Power Output

The 1991-1992 Isuzu Bighorn 3.1DT BASIC delivers commendable engine performance and power output, making it a reliable SUV for various driving conditions.

Under the hood, the Isuzu Bighorn 3.1DT BASIC is equipped with a 3.1-liter 4JG2 engine. This water-cooled 4-cylinder engine is known for its durability and efficiency, providing consistent power for both urban commutes and off-road adventures.

With a maximum power output of 126.7 PS (125 bhp) at 3600 rpm and a torque of 274.5 Nm (202.5 lb.ft) at 2000 rpm, the Isuzu Bighorn 3.1DT BASIC offers ample power for acceleration and overtaking maneuvers.

The 4JG2 engine incorporates a charger, enhancing its responsiveness and ensuring smooth power delivery. This feature proves valuable when navigating challenging terrains or steep inclines.

The engine's design and construction, including a bore of 9.5 cm (3.74 inches) and a stroke of 10.7 cm (4.21 inches), contribute to its efficient combustion and overall performance.

Moreover, the Isuzu Bighorn 3.1DT BASIC achieves a compression ratio of 20, striking a balance between power and fuel efficiency. This compression ratio allows the engine to utilize fuel effectively, optimizing the SUV's performance.

The engine's capabilities are further supported by the 4-speed automatic transmission (4AT), enabling seamless gear shifts and smooth acceleration.

Overall, the Isuzu Bighorn 3.1DT BASIC's engine performance and power output make it a dependable SUV for various driving needs. Whether tackling challenging terrains or cruising on highways, this vehicle demonstrates its capability and reliability in every journey.

Notable Features and Safety Specifications

The 1991-1992 Isuzu Bighorn 3.1DT BASIC comes equipped with several notable features and safety specifications, ensuring a comfortable and secure driving experience for its occupants.

1. Spacious Interior: The Isuzu Bighorn 3.1DT BASIC offers a roomy cabin with seating for up to four passengers. The interior dimensions provide ample legroom and headspace for a comfortable journey.

2. 4WD Drivetrain: The 4WD traction system enhances the SUV's off-road capabilities, allowing it to tackle challenging terrains with confidence.

3. 3.1-liter 4JG2 Engine: The powerful 4JG2 engine delivers 126.7 PS (125 bhp) of maximum power at 3600 rpm, providing ample performance for both city driving and off-road adventures.

4. 4-Speed Automatic Transmission: The 4AT transmission ensures smooth gear shifts, contributing to a refined driving experience.

5. Ventilated Disc Brakes: The front and rear brakes are equipped with ventilated discs, offering excellent braking performance and safety.

6. 4-Link Rear Suspension: The 4-link type coil spring rear suspension enhances stability and ride comfort, ensuring a smooth journey for passengers.

7. Cornering Lamps: The SUV is equipped with cornering lamps, providing better visibility during nighttime driving and turns.

8. Safety Belts: Standard 3-point safety belts for all passengers help ensure their safety in the event of a collision or sudden braking.

9. Child Car Restraints: The Isuzu Bighorn 3.1DT BASIC comes with child car restraints to secure younger passengers, prioritizing their safety.

10. Durable Frame: The sturdy frame construction adds an extra layer of protection in case of an impact.

11. Removable Seats: The standard removable seats offer versatility in configuring the cabin for different seating and cargo arrangements.

12. Standard Aluminum Disks: The aluminum disks contribute to the overall stability and performance of the SUV.

13. High Ground Clearance: The SUV's ground clearance of 21.5 cm (8.46 inches) allows it to navigate over rough terrain without scraping the undercarriage.

14. 4-Wheel Anti-Lock Braking System (ABS): The ABS enhances braking control, reducing the risk of skidding during emergency stops.

The Isuzu Bighorn 3.1DT BASIC excels in providing a combination of essential features and safety specifications, ensuring a comfortable and secure ride for both driver and passengers. Its capabilities make it a dependable choice for daily commutes and adventurous journeys alike.

Cargo Space and Interior Dimensions

The 1991-1992 Isuzu Bighorn 3.1DT BASIC offers ample cargo space and well-designed interior dimensions, making it a practical SUV for both passengers and their belongings.

Inside the cabin, the Isuzu Bighorn 3.1DT BASIC provides a spacious and comfortable environment for up to four passengers. With an interior length of 168.5 cm (66.33 inches), occupants have sufficient legroom to enjoy extended journeys without feeling cramped.

The interior width measures 145 cm (57.08 inches), offering ample shoulder room for all passengers, promoting a relaxed and enjoyable ride. Additionally, the interior height reaches 119 cm (46.85 inches), providing enough headspace for passengers of various heights.

The SUV's thoughtful design extends to its cargo space, ensuring there is enough room to accommodate luggage, sports equipment, or other belongings. The removable seats allow for versatile configurations, enabling owners to adapt the cabin layout according to their needs.

The Isuzu Bighorn 3.1DT BASIC also features a practical and user-friendly layout for storing smaller items. Various storage compartments, cup holders, and other amenities add to the convenience of the vehicle's interior.

With its spacious and versatile interior dimensions, the Isuzu Bighorn 3.1DT BASIC proves to be a reliable choice for families, adventure enthusiasts, and anyone seeking a comfortable and functional SUV for their journeys. Whether it's a road trip with friends or transporting bulky cargo, this SUV offers the flexibility and comfort needed to make every ride enjoyable.

Recommended Tires and Wheel Options

The 1991-1992 Isuzu Bighorn 3.1DT BASIC benefits from recommended tire options that enhance its performance and handling capabilities. When it comes to selecting tires for this SUV, factors such as terrain, weather conditions, and driving preferences play crucial roles.

One of the recommended tire options for the Isuzu Bighorn 3.1DT BASIC is the 245/70 R16 size. These tires strike a balance between off-road capability and on-road comfort. The 16-inch rims provide a sturdy foundation for the tires, contributing to stable handling and a smooth ride.

With a tire width of 245 mm and an aspect ratio of 70, these tires offer excellent traction on various surfaces. The tread pattern is designed to deliver reliable performance on both dry and wet roads, ensuring optimal grip and control.

For those planning off-road adventures or encountering challenging terrains, all-terrain tires are a popular choice. These tires combine the qualities of highway tires with off-road capabilities, allowing the Isuzu Bighorn 3.1DT BASIC to confidently tackle gravel roads, mud, and light trails.

Owners who prioritize highway comfort and reduced road noise may opt for highway or touring tires. These tires are engineered to provide a smooth and quiet ride on paved roads, making them suitable for daily commuting and long-distance travel.

Furthermore, it is essential to ensure that the selected tires are suitable for the vehicle's load capacity and speed rating, meeting the manufacturer's specifications.

When choosing tires for the Isuzu Bighorn 3.1DT BASIC, consulting with a professional tire dealer or reading user reviews can provide valuable insights into the best tire options based on specific driving needs and preferences. Properly selected and well-maintained tires not only enhance the SUV's performance but also contribute to its safety and overall driving experience.

Conclusion: Isuzu Bighorn 3.1DT BASIC Overview

The 1991-1992 Isuzu Bighorn 3.1DT BASIC is a robust and versatile SUV that offers a blend of practicality, performance, and fuel efficiency. As part of the first generation of Isuzu Bighorn, this model lays the foundation for the SUV's reputation as a reliable and capable vehicle.

Equipped with a 3.1-liter 4JG2 engine, the Isuzu Bighorn 3.1DT BASIC delivers a maximum power output of 126.7 PS (125 bhp) at 3600 rpm. This engine's design, coupled with the 4-speed automatic transmission, ensures smooth acceleration and dependable performance on various terrains.

The SUV's interior is spacious, accommodating up to four passengers with ample legroom and headspace. The removable seats allow for versatile configurations, making it suitable for transporting both passengers and cargo.

Safety features such as standard 3-point safety belts, child car restraints, and a durable frame prioritize the well-being of occupants. Additionally, cornering lamps enhance nighttime visibility, further enhancing the SUV's safety.

The Isuzu Bighorn 3.1DT BASIC comes with recommended tire options that complement its off-road capabilities. With 245/70 R16 tires, the SUV offers reliable traction on different surfaces, ensuring a stable and comfortable ride.

The vehicle's fuel tank capacity of 22.4 US gallons (85 liters) provides an extended driving range, making it a suitable choice for long journeys and adventures.

Overall, the Isuzu Bighorn 3.1DT BASIC stands as a practical and dependable SUV, offering a balance of power, efficiency, and safety features. Its versatility makes it a popular choice for families, outdoor enthusiasts, and those seeking a capable vehicle for both everyday commutes and off-road escapades.

FAQ: Frequently Asked Questions about the 1991-1992 Isuzu Bighorn 3.1DT BASIC