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

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

2021–2023 · 315 kW
43.5l/100 km
median; 41.9–48.9 across 13 declared configurations
Mercedes-Benz Arocs, 315 kW, 8x4 rigid lorry and Volvo FMX, 315 kW, 8x4 rigid lorry side by side
SpecificationMercedes-Benz Arocs, 315 kW, 8x4 rigid lorryVolvo FMX, 315 kW, 8x4 rigid lorry
Vehicle formLorry (BA)RegisteredLorry (BA)Registered
Axle configuration8×4Declared8×4Declared
Registered new2018–2024Registeredcentral 90% of records2021–2023Registeredcentral 90% of records
Engine power315 kWDeclared315 kWDeclared
Engine displacement10.7 litresDeclared12.8 litresDeclared
GearboxautomatedDeclaredautomated, automaticDeclared
Emission classEURO VI A, EURO VI C, EURO VI D, EURO VI ERegisteredNot recorded
Gross vehicle weight32,000–44,000 kgRegisteredmedian 37,000 kg, over 58 registrations36,000–40,000 kgDeclaredmedian 40,000 kg, across 67 declared configurations
Kerb weight13,010–35,200 kgRegisteredmedian 20,607 kg, over 58 registrationsNot recorded
Wheelbase5,600–7,200 mmRegisteredmedian 6,600 mm, over 58 registrationsNot recorded
Overall length8,240–12,310 mmRegisteredmedian 10,450 mm, over 58 registrationsNot recorded
Overall height3,260–4,000 mmRegisteredmedian 3,950 mm, over 30 registrationsNot recorded
Declared fuel, construction45 l/100 km Declaredmedian; 43.3–46.5 l/100 km across 35 declared configurations43.5 l/100 km Declaredmedian; 41.9–48.9 l/100 km across 13 declared configurations
CO₂ per tonne-km91.23 g Declaredmedian; 87.78–94.2 g88.27 g Declaredmedian; 85.1–99.12 g

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

What the numbers actually say

There is 1.5 l/100 km between these two (3.4%). 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 1,800 litres a year (£2,520). The declared figures for one of them alone span 7 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 specificationFMX, 315 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 FMX, 315 kW, 8x4 rigid lorry52,200 litres
£73,080 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.