median; 35.3–36.1 across 5 declared configurations
Iveco S-Way, 309 kW, 4x2 tractor unit and Mercedes-Benz Arocs, 310 kW, 4x2 tractor unit side by side
Specification
Iveco S-Way, 309 kW, 4x2 tractor unit
Mercedes-Benz Arocs, 310 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
2019–2023Registeredcentral 90% of records
Engine power
309 kWDeclared
310 kWDeclared
Engine displacement
11.1 litresDeclared
12.8 litresDeclared
Gearbox
automated, manualDeclared
automatedDeclared
Emission class
Not recorded
EURO VI DRegistered
Gross vehicle weight
19,000–20,000 kgDeclaredmedian 20,000 kg, across 126 declared configurations
18,000 kgRegistered
Kerb weight
Not recorded
7,529 kgRegistered
Wheelbase
Not recorded
3,900 mmRegistered
Overall length
Not recorded
6,200 mmRegistered
Declared fuel, long haul
31.7 l/100 km Declaredmedian; 29.9–36.1 l/100 km across 50 declared configurations
35.3 l/100 km Declaredmedian; 35.3–36.1 l/100 km across 5 declared configurations
CO₂ per tonne-km
43.02 g Declaredmedian; 40.51–48.96 g
47.81 g Declaredmedian; 47.81–48.93 g
Fuel and CO₂: long haul at 19.3 t, 2022 declarations.
What the numbers actually say
The Iveco S-Way, 309 kW, 4x2 tractor unit declared 3.6 l/100 km less (11.3%) 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 4,320 litres a year, or £6,048. A gap this size is outside the 10% tolerance of declared figures.
