The Isuzu Bighorn, known as the Isuzu Mu in some markets, was a mid-size SUV produced by Isuzu between 1998 and 2002. This generation, internally designated as the UBS series, represented a significant step up in refinement and capability for Isuzu’s SUV offerings. The 3.5 i V6 variant, equipped with a 3.5-liter engine producing 233 horsepower, was positioned as the premium offering within the Bighorn lineup, targeting buyers seeking a blend of on-road comfort and off-road prowess. It was primarily sold in Japan, Australia, and select European markets, and was not officially offered in the United States.
Technical Specifications
| Brand | Isuzu |
| Model | Bighorn |
| Generation | Bighorn (SUV) |
| Type (Engine) | 3.5 i V6 (233 Hp) |
| Start of production | 1998 |
| End of production | 2002 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SUV |
| Seats | 5 |
| Doors | 5 |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 8.7 kg/Hp, 114.8 Hp/tonne |
| Weight-to-torque ratio | 6.5 kg/Nm, 153.7 Nm/tonne |
| Power | 233 Hp @ 5400 rpm |
| Power per litre | 66.7 Hp/l |
| Torque | 312 Nm @ 3000 rpm, 230.12 lb.-ft. @ 3000 rpm |
| Engine layout | Front, Longitudinal |
| Engine displacement | 3494 cm3, 213.22 cu. in. |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Cylinder Bore | 93.4 mm, 3.68 in. |
| Piston Stroke | 85 mm, 3.35 in. |
| Compression ratio | 9.1:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC |
| Kerb Weight | 2030 kg, 4475.38 lbs |
| Fuel tank capacity | 85 l, 22.45 US gal | 18.7 UK gal |
| Length | 4750 mm, 187.01 in. |
| Width | 1745 mm, 68.7 in. |
| Height | 1840 mm, 72.44 in. |
| Wheelbase | 2760 mm, 108.66 in. |
| Front track | 1455 mm, 57.28 in. |
| Rear (Back) track | 1460 mm, 57.48 in. |
| Minimum turning circle | 11.6 m, 38.06 ft. |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 5 gears, manual transmission |
| Front brakes | Ventilated discs |
| Rear brakes | Drum |
| Tires size | 245/70 R16 |
| Wheel rims size | 7JJ x 16 |
Powertrain & Engine Architecture
The heart of the Bighorn 3.5 i V6 is the 6VE1 engine, a 3.5-liter naturally aspirated V6. This engine utilizes a 60-degree V-angle, contributing to a relatively compact engine bay footprint. The engine features a double overhead camshaft (DOHC) valvetrain with four valves per cylinder, optimizing airflow for improved performance. Fuel delivery is managed by a multi-port fuel injection system, providing precise fuel metering for efficient combustion. The 6VE1 engine was known for its smooth power delivery and relatively quiet operation. The 5-speed manual transmission was the standard offering for this variant, providing drivers with full control over the engine’s power. The transmission was designed to handle the engine’s 312 Nm (230 lb-ft) of torque, offering a balance between acceleration and fuel efficiency.
Driving Characteristics
The Bighorn 3.5 i V6 offered a noticeably more spirited driving experience compared to the lower-displacement, four-cylinder models. The 233 horsepower output provided ample power for both on-road cruising and off-road adventures. The manual transmission allowed for precise gear selection, maximizing the engine’s torque across a wide range of speeds. While not a sports car, the Bighorn 3.5 i V6 could accelerate from 0 to 60 mph in around 9-10 seconds, which was competitive for its class at the time. The all-wheel-drive system provided excellent traction in various conditions, making it a capable off-roader. The suspension, tuned for comfort, absorbed bumps and irregularities in the road effectively, providing a relatively smooth ride.
Equipment & Trim Levels
The 3.5 i V6 variant typically came well-equipped, reflecting its position as the top-of-the-line model. Standard features often included air conditioning, power windows and locks, a premium audio system, and alloy wheels. Interior upholstery was typically cloth or leather, with higher trims offering more luxurious materials. Optional extras could include a sunroof, upgraded audio systems, and various off-road accessories such as a winch or skid plates. The dashboard layout was functional and straightforward, with easy-to-read gauges and controls.
Chassis & Braking
The Bighorn utilized a body-on-frame construction, providing a robust and durable chassis. The front suspension featured independent double wishbones, while the rear suspension employed a multi-link setup. This configuration provided a good balance between ride comfort and handling. Braking duties were handled by ventilated discs at the front and drum brakes at the rear. While adequate for most driving situations, the rear drum brakes were a point of criticism compared to the all-disc setups found on some competitors. The 245/70 R16 tires provided good grip in both on- and off-road conditions.
Market Reception & Comparison
The Isuzu Bighorn 3.5 i V6 was generally well-received by automotive critics, who praised its powerful engine, comfortable ride, and capable all-wheel-drive system. However, some critics noted that the interior design was somewhat dated compared to newer SUVs on the market. Compared to its siblings, the 3.5 i V6 offered a significant performance advantage over the lower-displacement models. The 2.8-liter diesel engine, while offering good fuel economy, lacked the power and refinement of the V6. The V6 was also more expensive to purchase and maintain than the four-cylinder and diesel variants, appealing to a more discerning buyer willing to pay a premium for performance and luxury.
Legacy
The Isuzu Bighorn 3.5 i V6, while not a high-volume seller, has developed a loyal following among enthusiasts. The 6VE1 engine is known for its reliability when properly maintained. However, like any older vehicle, it is susceptible to age-related issues such as oil leaks and worn suspension components. In the used car market, the 3.5 i V6 variant commands a premium over the lower-spec models, reflecting its desirable engine and equipment levels. Parts availability can be a challenge in some regions, but a dedicated community of owners and online resources helps to keep these vehicles on the road. The Bighorn 3.5 i V6 represents a unique blend of Japanese engineering, robust construction, and V6 power, making it a compelling choice for those seeking a capable and distinctive SUV.
