Comparison · 8×4 lorry · construction at 12.9 t

Iveco S-Way, 338 kW, 8x4 rigid lorry vs Mercedes-Benz Arocs, 335 kW, 8x4 rigid lorry

Iveco S-Way, 338 kW, 8x4 rigid lorry

2021–2023 · 338 kW
42.7l/100 km
median; 40.5–46.5 across 12 declared configurations

Mercedes-Benz Arocs, 335 kW, 8x4 rigid lorry

2019–2026 · 335 kW
44.6l/100 km
median; 42–48 across 54 declared configurations
Iveco S-Way, 338 kW, 8x4 rigid lorry and Mercedes-Benz Arocs, 335 kW, 8x4 rigid lorry side by side
SpecificationIveco S-Way, 338 kW, 8x4 rigid lorryMercedes-Benz Arocs, 335 kW, 8x4 rigid lorry
Vehicle formLorry (BA)RegisteredLorry (BA)Registered
Axle configuration8×4Declared8×4Declared
Registered new2021–2023Registeredcentral 90% of records2019–2026Registeredcentral 90% of records
Engine power338 kWDeclared335 kWDeclared
Engine displacement11.1 litresDeclared10.7 litresDeclared
Gearboxautomated, manualDeclaredautomatedDeclared
Emission classNot recordedEURO VI, EURO VI C, EURO VI D, EURO VI ERegistered
Gross vehicle weight32,000–36,000 kgDeclaredmedian 36,000 kg, across 59 declared configurations31,795–44,800 kgRegisteredmedian 37,000 kg, across 1 type-approval version and 74 records without one
Kerb weightNot recorded12,390–40,480 kgRegisteredmedian 20,465 kg, over 75 registrations
WheelbaseNot recorded5,600–7,700 mmRegisteredmedian 6,500 mm, over 75 registrations
Overall lengthNot recorded8,580–12,100 mmRegisteredmedian 9,800 mm, over 75 registrations
Overall heightNot recorded3,700–4,000 mmRegisteredmedian 3,990 mm, over 48 registrations
Declared fuel, construction42.7 l/100 km Declaredmedian; 40.5–46.5 l/100 km across 12 declared configurations44.6 l/100 km Declaredmedian; 42–48 l/100 km across 54 declared configurations
CO₂ per tonne-km86.6 g Declaredmedian; 82.09–94.3 g90.6 g Declaredmedian; 85.15–97.4 g

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

What the numbers actually say

There is 1.9 l/100 km between these two (4.4%). 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 2,280 litres a year (£3,192). The declared figures for one of them alone span 6 l/100 km across its configurations, so the specification ordered matters more than the choice between these two.

Fuel over a year

120,000 km · assumed price
Iveco S-Way, 338 kW, 8x4 rigid lorry51,240 litres
£71,736 at the assumed price
Mercedes-Benz Arocs, 335 kW, 8x4 rigid lorry53,520 litres
£74,928 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.