median; 38.5–44.8 across 21 declared configurations
Iveco X-Way, 419 kW, 6x4 tractor unit and Mercedes-Benz Arocs, 425 kW, 6x4 tractor unit side by side
Specification
Iveco X-Way, 419 kW, 6x4 tractor unit
Mercedes-Benz Arocs, 425 kW, 6x4 tractor unit
Vehicle form
Tractor unit (BC)Registered
Tractor unit (BC)Registered
Axle configuration
6×4Declared
6×4Declared
Registered new
2020–2023Registeredcentral 90% of records
2015–2023Registeredcentral 90% of records
Engine power
419 kWDeclared
425 kWDeclared
Engine displacement
12.9 litresDeclared
15.6 litresDeclared
Gearbox
automated, manualDeclared
automatedDeclared
Emission class
Not recorded
EURO VI, EURO VI A, EURO VI D, EURO VI ERegistered
Gross vehicle weight
28,000–30,000 kgDeclaredmedian 30,000 kg, across 69 declared configurations
28,000–33,000 kgRegisteredmedian 33,000 kg, across 5 type-approval versions and 6 records without one
Kerb weight
Not recorded
10,312–16,775 kgRegisteredmedian 10,552 kg, over 21 registrations
Wheelbase
Not recorded
4,800–5,250 mmRegisteredmedian 4,800 mm, over 21 registrations
Overall length
Not recorded
7,060–7,530 mmRegisteredmedian 7,060 mm, over 21 registrations
Overall height
Not recorded
3,930–4,000 mmRegisteredmedian 3,930 mm, over 6 registrations
Declared fuel, long haul
37.7 l/100 km Declaredmedian; 34.6–43.5 l/100 km across 14 declared configurations
41.7 l/100 km Declaredmedian; 38.5–44.8 l/100 km across 21 declared configurations
CO₂ per tonne-km
51.1 g Declaredmedian; 46.9–59 g
56.51 g Declaredmedian; 52.22–60.8 g
Fuel and CO₂: long haul at 19.3 t, 2022 declarations.
What the numbers actually say
The Iveco X-Way, 419 kW, 6x4 tractor unit declared 4 l/100 km less (10.6%) 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 4,800 litres a year, or £6,720. A gap this size is outside the 10% tolerance of declared figures.
