The UAZ 31604 2.5 TDI, produced between 2000 and 2004, represents a significant evolution in the long line of UAZ (Ulyanovsky Automobile Plant) vehicles. Originating from the Soviet Union, UAZ has historically focused on producing rugged, utilitarian vehicles designed for challenging terrains and practical applications. The 31604, while still embodying this core philosophy, aimed to modernize the UAZ lineup with improved comfort and features, though it remained firmly rooted as a no-nonsense off-road vehicle. Primarily sold within Russia and other Eastern European and Central Asian markets, the 31604 was never officially exported to the United States. It served as a workhorse for both civilian and military applications, prized for its durability, simplicity, and exceptional off-road capability.
UAZ 31604 2.5 TDI: A Detailed Overview
The UAZ 31604 was intended as a replacement for the aging UAZ 3151, offering a more refined driving experience while retaining the legendary off-road prowess that UAZ vehicles are known for. It was positioned as a versatile vehicle suitable for rural transportation, agricultural work, and even light commercial duties. The 31604’s design reflected a pragmatic approach, prioritizing functionality over aesthetics. While not luxurious, it offered a step up in terms of interior comfort and features compared to its predecessors.
Engine & Performance
The UAZ 31604 2.5 TDI is powered by a 2.5-liter inline-four cylinder diesel engine, producing 103 horsepower. This engine, equipped with a turbocharger and a diesel common rail fuel injection system, delivers a torque output of 235 Nm (173.33 lb.-ft.) at 2000 rpm. While the horsepower figure may seem modest by modern standards, the engine’s torque characteristics provide ample pulling power for off-road driving and hauling loads. The engine is longitudinally mounted in the front of the vehicle. The 31604 achieves a maximum speed of 135 km/h (83.89 mph). The weight-to-power ratio is 19.2 kg/Hp, and the weight-to-torque ratio is 8.4 kg/Nm. The engine’s overhead camshaft (OHC) valvetrain contributes to its relatively efficient operation. The 5-speed manual transmission delivers power to all four wheels, making it a true all-wheel-drive vehicle.
Design & Features
The UAZ 31604 features a traditional body-on-frame construction, contributing to its robust nature and off-road durability. It’s a five-door vehicle with seating for up to seven passengers, making it a practical choice for families or groups. The vehicle’s design is boxy and utilitarian, reflecting its intended purpose. The exterior styling is characterized by its simple lines and rugged appearance. The interior is spartan but functional, with durable materials designed to withstand harsh conditions. Key features include hydraulic steering, disc brakes on the front wheels, and drum brakes on the rear. The suspension system utilizes a trailing arm setup at the front and leaf springs at the rear, providing a comfortable ride on and off-road. The vehicle’s 225/75 R16 tires, mounted on 6J x 16 wheel rims, provide adequate traction for various terrains. The fuel tank capacity is 90 liters (23.78 US gal).
Dimensions and Weight
The UAZ 31604 measures 4240 mm (166.93 in) in length, 1828 mm (71.97 in) in width, and 1935 mm (76.18 in) in height. It has a wheelbase of 2400 mm (94.49 in), with a front and rear track of 1445 mm (56.89 in). The kerb weight is 1975 kg (4354.13 lbs), while the maximum permissible weight is 2575 kg (5676.9 lbs). The maximum load capacity is 600 kg (1322.77 lbs). These dimensions and weight figures contribute to the vehicle’s overall stability and off-road capability.
Technical Specifications
| Brand | UAZ |
| Model | 31604 |
| Generation | 31604 |
| Type (Engine) | 2.5 TDI (103 Hp) |
| Start of production | 2000 year |
| End of production | 2004 year |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Off-road vehicle |
| Seats | 7 |
| Doors | 5 |
| Fuel Type | Diesel |
| Maximum speed | 135 km/h (83.89 mph) |
| Weight-to-power ratio | 19.2 kg/Hp |
| Weight-to-torque ratio | 8.4 kg/Nm |
| Power | 103 Hp |
| Power per litre | 41.2 Hp/l |
| Torque | 235 Nm @ 2000 rpm (173.33 lb.-ft. @ 2000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine displacement | 2500 cm3 (152.56 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Number of valves per cylinder | 2 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger |
| Valvetrain | OHC |
| Kerb Weight | 1975 kg (4354.13 lbs) |
| Max. weight | 2575 kg (5676.9 lbs) |
| Max load | 600 kg (1322.77 lbs) |
| Fuel tank capacity | 90 l (23.78 US gal | 19.8 UK gal) |
| Length | 4240 mm (166.93 in) |
| Width | 1828 mm (71.97 in) |
| Height | 1935 mm (76.18 in) |
| Wheelbase | 2400 mm (94.49 in) |
| Front track | 1445 mm (56.89 in) |
| Rear (Back) track | 1445 mm (56.89 in) |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 5 gears, manual transmission |
| Front suspension | Trailing arm |
| Rear suspension | Leaf spring |
| Front brakes | Disc |
| Rear brakes | Drum |
| Steering type | Worm-reduction unit |
| Power steering | Hydraulic Steering |
| Tires size | 225/75 R16 |
| Wheel rims size | 6J x 16 |
In conclusion, the UAZ 31604 2.5 TDI represents a practical and durable off-road vehicle that served a vital role in its primary markets. While not known for luxury or high performance, its robust construction, all-wheel-drive capability, and ample torque made it a reliable workhorse for a variety of applications. It stands as a testament to the UAZ brand’s commitment to producing vehicles that can withstand the rigors of challenging environments.
