AllTruckData
Comparison · 8×4 lorry · construction at 12.9 t

Mercedes-Benz Arocs, 315 kW, 8x4 rigid lorry vs Volvo FM, 323 kW, 8x4 rigid lorry

Mercedes-Benz Arocs, 315 kW, 8x4 rigid lorry

2018–2024 · 315 kW
45l/100 km
median; 43.3–46.5 across 35 declared configurations

Volvo FM, 323 kW, 8x4 rigid lorry

2020–2023 · 323 kW
42.6l/100 km
median; 38.7–44.8 across 28 declared configurations
Mercedes-Benz Arocs, 315 kW, 8x4 rigid lorry and Volvo FM, 323 kW, 8x4 rigid lorry side by side
SpecificationMercedes-Benz Arocs, 315 kW, 8x4 rigid lorryVolvo FM, 323 kW, 8x4 rigid lorry
Vehicle formLorry (BA)RegisteredLorry (BA)Registered
Axle configuration8×4Declared8×4Declared
Registered new2018–2024Registeredcentral 90% of records2020–2023Registeredcentral 90% of records
Engine power315 kWDeclared323 kWDeclared
Engine displacement10.7 litresDeclared10.8 litresDeclared
GearboxautomatedDeclaredautomatedDeclared
Emission classEURO VI A, EURO VI C, EURO VI D, EURO VI ERegisteredEURO VI D, EURO VI ERegistered
Gross vehicle weight32,000–44,000 kgRegisteredmedian 37,000 kg, over 58 registrations36,000–43,000 kgRegisteredmedian 43,000 kg, across 1 type-approval version and 7 records without one
Kerb weight13,010–35,200 kgRegisteredmedian 20,607 kg, over 58 registrations11,250–20,969 kgRegisteredmedian 13,220 kg, over 8 registrations
Wheelbase5,600–7,200 mmRegisteredmedian 6,600 mm, over 58 registrations5,950–7,050 mmRegisteredmedian 6,450 mm, over 8 registrations
Overall length8,240–12,310 mmRegisteredmedian 10,450 mm, over 58 registrations8,500–10,350 mmRegisteredmedian 9,440 mm, over 8 registrations
Overall height3,260–4,000 mmRegisteredmedian 3,950 mm, over 30 registrations3,150–3,970 mmRegisteredmedian 3,150 mm, over 2 registrations
Declared fuel, construction45 l/100 km Declaredmedian; 43.3–46.5 l/100 km across 35 declared configurations42.6 l/100 km Declaredmedian; 38.7–44.8 l/100 km across 28 declared configurations
CO₂ per tonne-km91.23 g Declaredmedian; 87.78–94.2 g86.4 g Declaredmedian; 78.5–90.9 g

Fuel and CO₂: construction at 12.9 t, 2022 declarations.

What the numbers actually say

There is 2.4 l/100 km between these two (5.6%). 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 2,880 litres a year (£4,032). The declared figures for one of them alone span 6.1 l/100 km across its configurations, so the specification ordered matters more than the choice between these two.

Arocs, 315 kW, 8x4 rigid lorry full specificationFM, 323 kW, 8x4 rigid lorry full specificationThe fuel ranking

Fuel over a year

120,000 km · assumed price
Mercedes-Benz Arocs, 315 kW, 8x4 rigid lorry54,000 litres
£75,600 at the assumed price
Volvo FM, 323 kW, 8x4 rigid lorry51,120 litres
£71,568 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.