Volvo Bm A20 6x4
Series: Volvo BM Articulated Dump Truck
Not the right version? The data comes from vehicle registers holding many near-identical versions side by side. Photograph the data plate — we read make and type from it. Open the scanner e-mail address required
Volvo BM articulated haulers 860 to A40 – the early days of the articulated hauler from Braås: 860 and 861, 5350, A20 to A35 and A40, TD engines, 109 to 295 kW
Under the Volvo BM name the register holds the articulated haulers of the years before 1995, when the construction equipment division still carried the suffix BM for Bolinder-Munktell. They continue the line that began in 1966 with the DR 631 'Gravel Charlie' in Braås: the 860 and 861 of the 1970s are the second generation with the TD 70 six-cylinder, the 5350 and 5350B of the 1980s the third, and with the A20, A25, A30, A35 and A40 the A series began in the late 1980s, its number giving the payload in tonnes and its letters B and C the generations – the system Volvo keeps to today's A60H. 4x4, 6x4 and 6x6 give axles and driven wheels: the 6x6 with all six wheels driven became the standard, the 6x4 remained the lighter road version.
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The register lists 17 versions with 108.9 to 294.6 kW from Volvo six-cylinders of 5,473 to 12,000 cm³ – TD 50, TD 60, TD 70 and TD 71 from Volvo's truck programme – torque from 445 to 1,665 Nm at 2,050 to 2,500 rpm, lengths from 8,955 to 11,137 mm, widths from 2,481 to 3,432 mm and heights from 2,800 to 3,700 mm.
The Volvo BM haulers founded the class every major maker serves today: the oscillating articulation, all-wheel drive and a body that unloads even in mud made the articulated hauler the earthmoving vehicle for sites without roads.
Used, the early models are collector pieces and farmyard machines, while the A25C and A40 of the 1990s are still at work. When buying, play in the articulation joint and oscillation bearings, the condition of body cylinders, brakes and tyres and parts supply through Volvo CE are what count.
Sources: SpecCodex register, model data: Volvo BM knickgelenkte Dumper, Volvo CE Geschichte (manufacturer)
Technical data
Engine
| Engine model | TD 71Gcorrect |
|---|---|
| Power | 203.8 hp (138.7 kW)correct |
| Rated speed | 2,200 rpmcorrect |
| Torque | 640.1 Nmcorrect |
| Speed at max. torque | 1,700 rpmcorrect |
| Cylinders | 6correct |
| Displacement | 6,730.2 cm³correct |
| Aspiration | turbochargedcorrect |
| Coolant capacity | 24.2 lcorrect |
| Engine oil capacity | 24.2 lcorrect |
Dimensions and weights
| Length | 10,046.2 mmcorrect |
|---|---|
| Width | 2,493.3 mmcorrect |
| Height | 3,100 mmcorrect |
| Wheelbase | 4,322.1 mmcorrect |
| Ground clearance | 399.3 mmcorrect |
Drivetrain and chassis
| Gearbox type | automatic gearbox Power-Shiftcorrect |
|---|---|
| Forward gears | 4correct |
| Reverse gears | 3correct |
| Tyre size | Front - 18.00 R 25* / Rear 20.5 R 25*correct |
| Top speed | 34.1 km/hcorrect |
Working data
| Hydraulic oil capacity | 170.3 lcorrect |
|---|---|
| Fuel tank capacity | 295.3 lcorrect |
Other data
| System voltage | 24 Vcorrect |
|---|
Frequently asked questions
How much power does the Volvo Bm A20 6x4 have?
The Volvo Bm A20 6x4 delivers 204 hp.
What engine does the Volvo Bm A20 6x4 have?
6 cylinders, 6,730 cm³ displacement.
How fast does the Volvo Bm A20 6x4 go?
Top speed is 34.1 km/h.
What are the dimensions of the Volvo Bm A20 6x4?
10,046 mm × 2,493 mm × 3,100 mm.
What to check before buying
- Check the hour meter against the service records — a replaced instrument is the most common gap.
- Compare the data plate and chassis number with the papers.
- Load the hydraulics and watch for sag.
- Ask about parts availability for this build year — the running costs hang on it.
A general list for this type of machine — no substitute for an inspection or an appraiser.
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This page carries 24 individual figures for this model. They come from 1 recorded source; every figure can be traced there. What we cannot document is not here — we leave gaps open rather than estimate them.
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Other models in this series
Sources: RitchieSpecs equipment specifications (retrieved August 2026) · How we check the data
Dump truck in 3D section
Turn the model, look inside and click an assembly — each one is explained.
