median; 31.6–40.7 across 14 declared configurations
Iveco S-Way, 251 kW, 4x2 rigid truck and Mercedes-Benz Arocs, 240 kW, 4x2 rigid truck side by side
Specification
Iveco S-Way, 251 kW, 4x2 rigid truck
Mercedes-Benz Arocs, 240 kW, 4x2 rigid truck
Vehicle form
Truck (BA)Registered
Truck (BA)Registered
Axle configuration
4×2Declared
4×2Declared
Registered new
2022–2023Registeredcentral 90% of records
2017–2023Registeredcentral 90% of records
Engine power
251 kWDeclared
240 kWDeclared
Engine displacement
8.7 litresDeclared
10.7 litresDeclared
Gearbox
automated, automatic, manualDeclared
automated, manualDeclared
Emission class
Not recorded
EURO VI A, EURO VI C, EURO VI ERegistered
Gross vehicle weight
20,000 kgDeclared
18,000–21,500 kgRegisteredmedian 19,500 kg, over 8 registrations
Kerb weight
Not recorded
10,805–18,600 kgRegisteredmedian 14,530 kg, over 8 registrations
Wheelbase
Not recorded
3,600–4,500 mmRegisteredmedian 4,200 mm, over 8 registrations
Overall length
Not recorded
6,750–8,990 mmRegisteredmedian 7,850 mm, over 8 registrations
Overall height
Not recorded
3,600 mmRegistered
Declared fuel, long haul
37.3 l/100 km Declaredmedian; 31.3–43.8 l/100 km across 42 declared configurations
33.6 l/100 km Declaredmedian; 31.6–40.7 l/100 km across 14 declared configurations
CO₂ per tonne-km
69.68 g Declaredmedian; 58.56–81.8 g
62.9 g Declaredmedian; 59.06–76 g
Fuel and CO₂: long haul at 14 t, 2022 declarations.
What the numbers actually say
The Mercedes-Benz Arocs, 240 kW, 4x2 rigid truck declared 3.7 l/100 km less (11%) on the long haul at 14 t, 2022 declarations. At 120,000 km a year and an assumed £1.40 a litre, that is about 4,440 litres a year, or £6,216. A gap this size is outside the 10% tolerance of declared figures.
