WhichTractor
  • Vehicle type: unspecified
  • Rigid chassis
  • WhichTractor size: Standard-size
  • No lab test on file
  • 1969–1970

It was ranked on an engine power figure whose source does not say gross or net. WhichTractor size, not the maker’s category

We looked and the record does not say what this machine is. How we decide what a machine is

Hanomag Robust 901 A (S) specs: hp, weight, years

Hanomag D162 R2 six-cylinder diesel. The manufacturer claimed 91 horsepower. No laboratory has tested one, so there is no measured figure at the shaft.

Engine power, claimed · gross or net not stated

91 hp

68 kW as stated by the source

No lab test on file

Claimed · standard not stated by the source

Source · Traktorenlexikon, “Hanomag Robust 901 A (S)”, claimed

This is the maker’s own figure, measured at the engine. Power at the PTO is lower — by how much, for this machine, nobody has measured.

Weight
8,223–8,885 lb
Hyd. flow
8.5 gpm
Top speed
12.3–16.9 mph

Hanomag Robust 901 A (S) specs: key facts

  • The Hanomag Robust 901 A (S) was built from 1969 to 1970.

  • The Hanomag Robust 901 A (S) has a claimed engine power (gross or net not stated) of 68 kW (91 hp); it has no measured PTO figure.

  • The Hanomag Robust 901 A (S) is four-wheel drive (4WD).

  • The Hanomag Robust 901 A (S) has a Hanomag D162 R2 engine, a 6-cylinder 4.71 L diesel unit.Source 1

  • The Hanomag Robust 901 A (S) weighs 3,730–4,030 kg (8,223–8,885 lb) unladen.

  • The Hanomag Robust 901 A (S) has an independent rear PTO running at 540/1000 rpm.

  • The hydraulic pump of the Hanomag Robust 901 A (S) delivers 32 L/min (8.5 gpm).

Source · Traktorenlexikon, “Hanomag Robust 901 A (S)”

How does the Robust 901 A (S) compare with its class?

  • Limitation:

    A hydraulic pump flow of 32 L/min is low for its class — 37% below the median of 51.1 L/min across the 298 machines within 10% of its power that hold this figure.

  • Limitation:

    A maximum engine torque of 281 N·m is low for its class — 17% below the median of 338 N·m across the 305 machines within 10% of its power that hold this figure.

Derived by WhichTractor from 366 comparable records. How we work this out

Illustration of the 1969–1970 Hanomag Robust 901 A (S), a 91 hp farm tractor, colour not recorded — shown unpainted, a drawing generated from its specification record
Illustration — not a photograph · colour not recorded — shown unpainted

How much horsepower does a Robust 901 A (S) have?

The only figure for the Robust 901 A (S) is 91 hp (68 kW) of claimed engine power, gross or net not stated, no test standard stated — not power at the shaft.

Engine, claimed (gross/net not stated)
91 hp

Source · Traktorenlexikon, “Hanomag Robust 901 A (S)”

What engine is in a Robust 901 A (S)?

A Robust 901 A (S) has a Hanomag D162 R2, a 6-cylinder 4.71 L diesel engine.

Engine — Robust 901 A (S) engine specifications
Make & modelHanomag D162 R2
Cylinders6, liquid-cooledSource 2
Displacement287.5 ci · 4.71 L
Max torque207 lb·ft · 281 N·mSource 2
Electrical system12 VSource 2

Source · Traktorenlexikon, “Hanomag Robust 901 (S)”

How much will a Robust 901 A (S) lift, and what is its hydraulic flow?

Hydraulic and PTO specifications for the Robust 901 A (S) are below.

Hydraulics & PTO — Robust 901 A (S) hydraulics and PTO specifications
Pump flow8.5 gpm · 32 L/min
Rear PTOIndependent, 540/1000 rpm

Source · Traktorenlexikon, “Hanomag Robust 901 A (S)”

What transmission does a Robust 901 A (S) have?

Transmission specifications for the Robust 901 A (S) are below.

Transmission — Robust 901 A (S) transmission specifications
ClutchDouble clutch for transmission and PTO
SteeringZF Hydro Gammer spindle steering with 150 bar
Top speed12.3–16.9 mph · 19.87–27.15 km/h

Source · Traktorenlexikon, “Hanomag Robust 901 A (S)”

How much does a Robust 901 A (S) weigh?

A Robust 901 A (S) weighs 8,223–8,885 lb (3,730–4,030 kg) unladen.

Weights & dimensions — Robust 901 A (S) weights and dimensions
Unladen weight8,223–8,885 lb · 3,730–4,030 kg
Wheelbase97.4–98.8 in · 2,475–2,510 mm
Length157.1 in · 3,990 mm
Width79.3–84.6 in · 2,015–2,150 mm
Height75.2 in · 1,910 mm
Ground clearance12.6 in · 320 mm
Front track64.7 in · 1,644 mm
Rear track59.1–77.2 in · 1,500–1,960 mm
Turning radius, braked13.5 ft · 4.10 m

Source · Traktorenlexikon, “Hanomag Robust 901 A (S)”

What oil does a Robust 901 A (S) take, and how much?

A Robust 901 A (S) engine takes 12.2 qt (11.5 L). Single source, not independently verified — always confirm against the operator’s manual for your machine.

Robust 901 A (S) fluid capacities, grades and service intervals
SystemCapacity
Engine oil12.2 qt · 11.5 LSource: Traktorenlexikon, “Hanomag Robust 901 A (S)” · single source, not independently verified
Transmission & hydraulic52.8 qt · 50 LSource: Traktorenlexikon, “Hanomag Robust 901 A (S)” · single source, not independently verified
Cooling system22.2 qt · 21 LSource: Traktorenlexikon, “Hanomag Robust 901 A (S)” · single source, not independently verified

Always confirm against the operator’s manual for your machine before service.

Which tractors compare with a Robust 901 A (S)?

Within 10% of its 91 hp of claimed engine power, the same type, and first built within 15 years of it.

Common questions about the Hanomag Robust 901 A (S)

Is a Robust 901 A (S) two-wheel drive or four-wheel drive?

The Hanomag Robust 901 A (S) is four-wheel drive (4WD).

What PTO does a Robust 901 A (S) have?

A Robust 901 A (S) has a independent 540/1000 rpm rear PTO.

Sources and how this page was built

Compiled from Traktorenlexikon, “Hanomag Robust 901 (S)”; and Traktorenlexikon, “Hanomag Robust 901 A (S)”.

Sources checked

14 SEP 2026

Spotted an error?

Sources

Facts taken from these documents, units converted. Numbers beside a figure refer to this list. Licences and attribution

  1. Traktorenlexikon: Hanomag Robust 901 (S) — CC BY-SA 4.0, WIKIBOOKS-TL-44102 · revision 1024190. Wikibooks contributors (Traktorenlexikon). Original document
  2. Traktorenlexikon: Hanomag Robust 901 A (S) — CC BY-SA 4.0, WIKIBOOKS-TL-44103 · revision 1026557. Wikibooks contributors (Traktorenlexikon). Original document