Comparison · 4×2 lorry · long haul at 14 t

Iveco S-Way, 251 kW, 4x2 rigid lorry vs Mercedes-Benz Arocs, 260 kW, 4x2 rigid lorry

Iveco S-Way, 251 kW, 4x2 rigid lorry

2022–2023 · 251 kW
37.3l/100 km
median; 31.3–43.8 across 42 declared configurations

Mercedes-Benz Arocs, 260 kW, 4x2 rigid lorry

2020–2023 · 260 kW
34.1l/100 km
median; 32.2–39.7 across 28 declared configurations
Iveco S-Way, 251 kW, 4x2 rigid lorry and Mercedes-Benz Arocs, 260 kW, 4x2 rigid lorry side by side
SpecificationIveco S-Way, 251 kW, 4x2 rigid lorryMercedes-Benz Arocs, 260 kW, 4x2 rigid lorry
Vehicle formLorry (BA)RegisteredLorry (BA)Registered
Axle configuration4×2Declared4×2Declared
Registered new2022–2023Registeredcentral 90% of records2020–2023Registeredcentral 90% of records
Engine power251 kWDeclared260 kWDeclared
Engine displacement8.7 litresDeclared7.7 litresDeclared
Gearboxautomated, automatic, manualDeclaredautomated, manualDeclared
Gross vehicle weight20,000 kgDeclared18,000–20,500 kgDeclaredmedian 19,000 kg, across 82 declared configurations
Declared fuel, long haul37.3 l/100 km Declaredmedian; 31.3–43.8 l/100 km across 42 declared configurations34.1 l/100 km Declaredmedian; 32.2–39.7 l/100 km across 28 declared configurations
CO₂ per tonne-km69.68 g Declaredmedian; 58.56–81.8 g63.82 g Declaredmedian; 60.22–74.28 g

Fuel and CO₂: long haul at 14 t, 2022 declarations.

What the numbers actually say

There is 3.2 l/100 km between these two (9.3%). 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 3,840 litres a year (£5,376). The declared figures for one of them alone span 12.5 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, 251 kW, 4x2 rigid lorry44,760 litres
£62,664 at the assumed price
Mercedes-Benz Arocs, 260 kW, 4x2 rigid lorry40,920 litres
£57,288 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.