International S-120: Which Version to Buy and Why
The International S-120 was offered as a Pickup from 1956 to 1957 in a single generation. The catalogue contains two versions, both named 3.9 MT, with identical engine output and transmission specifications. The key choice is therefore drivetrain and weight: one 3.9 MT has AWD and a kerb weight of 1,972 kg, while the other 3.9 MT has RWD and weighs 1,721 kg.
The International S-120 was offered as a Pickup from 1956 to 1957 in a single generation. The catalogue contains two versions, both named 3.9 MT, with identical engine output and transmission specifications. The key choice is therefore drivetrain and weight: one 3.9 MT has AWD and a kerb weight of 1,972 kg, while the other 3.9 MT has RWD and weighs 1,721 kg. The RWD version is 251 kg lighter, but neither version has an advantage in stated power or torque.
International S-120 generations compared
There is only one International S-120 generation in the data, produced from 1956 through 1957. It used a Pickup body and included two versions. Because there is no second generation or restyling listed, buyers cannot compare evolutionary changes in engines, body styles, performance, or equipment. The meaningful comparison is entirely within this generation: AWD versus RWD.
Both versions carry the exact catalogue name 3.9 MT. They can be distinguished as the 131 hp 3.9 MT with AWD and the 131 hp 3.9 MT with RWD. Each was offered over the same 1956–1957 period.
Engine and specs
The two International S-120 versions share the same 3,930 cm³ Gasoline engine. It has 6 cylinders in an Inline layout, 2 valves per cylinder, no boost, and a Carburetor fuel system. The engine is installed at the front in a longitudinal position. Bore and stroke are 90.49 × 102.15 mm.
Output is 131 hp, or 96 kW, at 3,800 rpm. Maximum torque is 283 Nm, although the engine speed at which that torque is produced was not measured. Each version uses a 4-speed Manual gearbox. Their only listed mechanical difference is the drive system.
| Version | Power | Torque | Displacement | Fuel | Cylinders | Layout | Boost | Gearbox | Drive |
|---|---|---|---|---|---|---|---|---|---|
| 3.9 MT, 131 hp, AWD | 131 hp (96 kW) at 3,800 rpm | 283 Nm; rpm not measured | 3,930 cm³ | Gasoline, 76 | 6 | Inline | No | 4-speed Manual | AWD |
| 3.9 MT, 131 hp, RWD | 131 hp (96 kW) at 3,800 rpm | 283 Nm; rpm not measured | 3,930 cm³ | Gasoline, 76 | 6 | Inline | No | 4-speed Manual | RWD |
Both engines produce approximately 33.3 hp per litre and 72.0 Nm per litre. Consequently, neither 3.9 MT offers a power-density advantage. The purchase decision should be based on AWD versus RWD and the associated kerb-weight difference, not on engine output.
Performance, mpg, and economy
Acceleration from 0 to 100 km/h was not measured for either the AWD or RWD 3.9 MT. Top speed was not measured for either version.
City fuel consumption, highway fuel consumption, and combined fuel consumption were also not measured for both versions. Tank capacity was not measured, so driving range cannot be calculated from the supplied data. CO₂ output and emissions class were not measured as well.
The lighter RWD version cannot be assigned a fuel-economy or acceleration advantage without measurements. Its lower kerb weight is documented, but any claim about its real-world mpg or speed would go beyond the available specifications.
Dimensions and weight
The AWD 3.9 MT has a kerb weight of 1,972 kg. The RWD 3.9 MT has a kerb weight of 1,721 kg, making it 251 kg lighter. The AWD version is approximately 14.6% heavier than the RWD model when the difference is compared with the RWD kerb weight.
Because both versions make 131 hp, their weight-to-power figures provide the clearest numerical distinction. The AWD 3.9 MT carries approximately 15.1 kg per horsepower, while the RWD 3.9 MT carries approximately 13.1 kg per horsepower. In inverse terms, the AWD model provides approximately 66.4 hp per tonne and the RWD model approximately 76.1 hp per tonne.
Gross weight was not measured for either version. Ground clearance was not measured. Tank capacity was not measured, and wheel sizes were not measured. Overall length, width, height, and wheelbase are not provided in the data and therefore cannot be compared.
| Version | Kerb weight | Gross weight | Ground clearance | Tank | Wheel sizes |
|---|---|---|---|---|---|
| 3.9 MT, 131 hp, AWD | 1,972 kg | Not measured | Not measured | Not measured | Not measured |
| 3.9 MT, 131 hp, RWD | 1,721 kg | Not measured | Not measured | Not measured | Not measured |
Reliability and problems
Reliability measurements and recorded problem data are not provided for either International S-120 3.9 MT. The specifications therefore do not support a claim that AWD or RWD is more reliable. Service intervals, repair frequency, component life, and maintenance costs were not measured.
The available data does show that both versions use the same engine specification, Carburetor fuel system, and 4-speed Manual gearbox. However, shared specifications alone do not prove equal reliability.
Which International S-120 version should you buy?
Choose the 3.9 MT with RWD if the decision is based on the strongest measured power-to-weight result. It has the same 131 hp and 283 Nm as the AWD version but weighs 1,721 kg, which is 251 kg less. Its calculated 13.1 kg per horsepower compares with approximately 15.1 kg per horsepower for the AWD model. In measurable terms, the RWD version gives each horsepower less mass to carry.
Choose the 3.9 MT with AWD when AWD itself is the required feature. Its extra 251 kg does not buy additional engine power, torque, displacement, gearbox ratios, or measured performance: output remains 131 hp and 283 Nm from 3,930 cm³, with the same 4-speed Manual gearbox. What distinguishes this version in the supplied data is AWD rather than RWD.
There is no factual basis here for comparing purchase prices or claiming that one version offers better monetary value, because prices were not measured. There is also no measured acceleration, top-speed, fuel-consumption, reliability, or ground-clearance result that could overturn the basic conclusion. On the specifications available, the RWD 3.9 MT is the lighter choice with the better calculated power-to-weight ratio; the AWD 3.9 MT is the choice for a buyer whose priority is the AWD drivetrain.