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

Mercedes-Benz Arocs, 375 kW, 8x4 rigid lorry vs Volvo FMX, 375 kW, 8x4 rigid lorry

Mercedes-Benz Arocs, 375 kW, 8x4 rigid lorry

2019–2025 · 375 kW
46.5l/100 km
median; 42.1–48.6 across 154 declared configurations

Volvo FMX, 375 kW, 8x4 rigid lorry

2021–2023 · 375 kW
43.8l/100 km
median; 38.9–48.2 across 93 declared configurations
Mercedes-Benz Arocs, 375 kW, 8x4 rigid lorry and Volvo FMX, 375 kW, 8x4 rigid lorry side by side
SpecificationMercedes-Benz Arocs, 375 kW, 8x4 rigid lorryVolvo FMX, 375 kW, 8x4 rigid lorry
Vehicle formLorry (BA)RegisteredLorry (BA)Registered
Axle configuration8×4Declared8×4Declared
Registered new2019–2025Registeredcentral 90% of records2021–2023Registeredcentral 90% of records
Engine power375 kWDeclared375 kWDeclared
Engine displacement12.8 litresDeclared12.8 litresDeclared
Gearboxautomated, manualDeclaredautomated, automaticDeclared
Emission classEURO 6, EURO VI A, EURO VI C, EURO VI D, EURO VI ERegisteredEURO VI ERegistered
Gross vehicle weight32,000–44,000 kgRegisteredmedian 37,000 kg, across 2 type-approval versions and 150 records without one43,000 kgRegistered
Kerb weight13,321–27,775 kgRegisteredmedian 24,018 kg, over 152 registrations14,328–18,526 kgRegisteredmedian 14,657 kg, over 4 registrations
Wheelbase5,600–7,510 mmRegisteredmedian 6,900 mm, over 152 registrations6,110–6,850 mmRegisteredmedian 6,150 mm, over 4 registrations
Overall length8,500–11,850 mmRegisteredmedian 10,350 mm, over 152 registrations8,790–9,620 mmRegisteredmedian 8,800 mm, over 4 registrations
Overall height3,510–4,000 mmRegisteredmedian 3,820 mm, over 83 registrations3,050–3,780 mmRegisteredmedian 3,160 mm, over 3 registrations
Declared fuel, construction46.5 l/100 km Declaredmedian; 42.1–48.6 l/100 km across 154 declared configurations43.8 l/100 km Declaredmedian; 38.9–48.2 l/100 km across 93 declared configurations
CO₂ per tonne-km94.3 g Declaredmedian; 85.44–98.7 g88.8 g Declaredmedian; 78.96–97.7 g

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

What the numbers actually say

There is 2.7 l/100 km between these two (6.1%). 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 3,240 litres a year (£4,536). The declared figures for one of them alone span 9.3 l/100 km across its configurations, so the specification ordered matters more than the choice between these two.

Arocs, 375 kW, 8x4 rigid lorry full specificationFMX, 375 kW, 8x4 rigid lorry full specificationThe fuel ranking

Fuel over a year

120,000 km · assumed price
Mercedes-Benz Arocs, 375 kW, 8x4 rigid lorry55,800 litres
£78,120 at the assumed price
Volvo FMX, 375 kW, 8x4 rigid lorry52,560 litres
£73,584 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.