median; 32.7–39.8 across 36 declared configurations
Iveco S-Way, 338 kW, 4x2 tractor unit, 11.1 L (2020–2023) and Mercedes-Benz Arocs, 335 kW, 4x2 tractor unit side by side
Specification
Iveco S-Way, 338 kW, 4x2 tractor unit, 11.1 L (2020–2023)
Mercedes-Benz Arocs, 335 kW, 4x2 tractor unit
Vehicle form
Tractor unit (BC)Registered
Tractor unit (BC)Registered
Axle configuration
4×2Declared
4×2Declared
Registered new
2020–2023Registeredcentral 90% of records
2020–2023Registeredcentral 90% of records
Engine power
338 kWDeclared
335 kWDeclared
Engine displacement
11.1 litresDeclared
10.7 litresDeclared
Gearbox
automated, manualDeclared
automated, manualDeclared
Emission class
Not recorded
EURO VI CRegistered
Gross vehicle weight
19,000–20,000 kgDeclaredmedian 20,000 kg, across 1,341 declared configurations
18,000 kgRegistered
Kerb weight
Not recorded
7,777 kgRegistered
Wheelbase
Not recorded
3,600 mmRegistered
Overall length
Not recorded
6,160 mmRegistered
Declared fuel, long haul
31.8 l/100 km Declaredmedian; 29.8–37.4 l/100 km across 416 declared configurations
35.6 l/100 km Declaredmedian; 32.7–39.8 l/100 km across 36 declared configurations
CO₂ per tonne-km
43.13 g Declaredmedian; 40.36–50.71 g
48.31 g Declaredmedian; 44.32–54 g
Fuel and CO₂: long haul at 19.3 t, 2022 declarations.
What the numbers actually say
The Iveco S-Way, 338 kW, 4x2 tractor unit, 11.1 L (2020–2023) declared 3.8 l/100 km less (11.9%) on the long haul at 19.3 t, 2022 declarations. At 120,000 km a year and an assumed £1.40 a litre, that is about 4,560 litres a year, or £6,384. A gap this size is outside the 10% tolerance of declared figures.
