AllTruckData
Comparison · 6×4 tractor unit · long haul at 19.3 t

Mercedes-Benz Actros, 390 kW, 6x4 tractor unit vs Mercedes-Benz Arocs, 390 kW, 6x4 tractor unit

Mercedes-Benz Actros, 390 kW, 6x4 tractor unit

2020–2024 · 390 kW
37.9l/100 km
median; 34.7–41.6 across 27 declared configurations

Mercedes-Benz Arocs, 390 kW, 6x4 tractor unit

2018–2023 · 390 kW
40.1l/100 km
median; 35.5–45.2 across 30 declared configurations
Mercedes-Benz Actros, 390 kW, 6x4 tractor unit and Mercedes-Benz Arocs, 390 kW, 6x4 tractor unit side by side
SpecificationMercedes-Benz Actros, 390 kW, 6x4 tractor unitMercedes-Benz Arocs, 390 kW, 6x4 tractor unit
Vehicle formTractor unit for semi-trailer (BC)RegisteredTractor unit for semi-trailer (BC)Registered
Axle configuration6×4Declared6×4Declared
Registered new2020–2024Registeredcentral 90% of records2018–2023Registeredcentral 90% of records
Engine power390 kWDeclared390 kWDeclared
Engine displacement12.8 litresDeclared12.8 litresDeclared
GearboxautomatedDeclaredautomated, manualDeclared
Emission classEURO VI, EURO VI D, EURO VI ERegisteredEURO VIRegistered
Gross vehicle weight28,000–33,000 kgRegisteredmedian 33,000 kg, across 7 type-approval versions and 6 records without one33,000 kgRegistered
Kerb weight9,600–10,760 kgRegisteredmedian 10,190 kg, over 27 registrations10,287–10,351 kgRegisteredmedian 10,340 kg, over 9 registrations
Wheelbase4,600–4,900 mmRegisteredmedian 4,600 mm, over 27 registrations4,800 mmRegistered
Overall length6,750–7,120 mmRegisteredmedian 6,760 mm, over 27 registrations7,060 mmRegistered
Overall height3,620–3,990 mmRegisteredmedian 3,660 mm, over 26 registrationsNot recorded
Declared fuel, long haul37.9 l/100 km Declaredmedian; 34.7–41.6 l/100 km across 27 declared configurations40.1 l/100 km Declaredmedian; 35.5–45.2 l/100 km across 30 declared configurations
CO₂ per tonne-km51.38 g Declaredmedian; 47.09–56.4 g54.32 g Declaredmedian; 48.18–61.22 g

Fuel and CO₂: long haul at 19.3 t, 2022 declarations.

What the numbers actually say

There is 2.2 l/100 km between these two (5.8%). That is inside the 10% tolerance of declared figures, so on fuel alone neither is the better choice: at 120,000 km a year and an assumed £1.40 a litre the gap would be about 2,640 litres a year (£3,696). The declared figures for one of them alone span 9.7 l/100 km across its configurations, so the specification ordered matters more than the choice between these two.

Actros, 390 kW, 6x4 tractor unit full specificationArocs, 390 kW, 6x4 tractor unit full specificationThe fuel ranking

Fuel over a year

120,000 km · assumed price
Mercedes-Benz Actros, 390 kW, 6x4 tractor unit45,480 litres
£63,672 at the assumed price
Mercedes-Benz Arocs, 390 kW, 6x4 tractor unit48,120 litres
£67,368 at the assumed price
At 120,000 km a year and an assumed £1.40 a litre; the price is an assumption, not one we track.