Mercedes-Benz Arocs, 310 kW, 4x2 tractor unit and Scania S 420 A4x2 side by side
Specification
Mercedes-Benz Arocs, 310 kW, 4x2 tractor unit
Scania S 420 A4x2
Vehicle form
Tractor unit (BC)Registered
Tractor unit (BC)Registered
Axle configuration
4×2Declared
4×2Declared
Registered new
2019–2023Registeredcentral 90% of records
2022–2025Registeredcentral 90% of records
Engine power
310 kWDeclared
309 kWDeclared
Engine displacement
12.8 litresDeclared
12.7 litresDeclared
Gearbox
automatedDeclared
automatedDeclared
Emission class
EURO VI DRegistered
EURO VI ERegistered
Gross vehicle weight
18,000 kgRegistered
19,000–21,000 kgRegisteredmedian 19,000 kg, across 11 type-approval versions
Kerb weight
7,529 kgRegistered
7,977–8,735 kgRegisteredmedian 8,461 kg, over 81 registrations
Wheelbase
3,900 mmRegistered
3,750–3,950 mmRegisteredmedian 3,750 mm, over 81 registrations
Overall length
6,200 mmRegistered
5,960–6,160 mmRegisteredmedian 5,960 mm, over 81 registrations
Overall height
Not recorded
3,770–4,000 mmRegisteredmedian 3,980 mm, over 81 registrations
Declared fuel, long haul
35.3 l/100 km Declaredmedian; 35.3–36.1 l/100 km across 5 declared configurations
25.2 l/100 km Declaredmedian; 24.7–27 l/100 km across 29 declared configurations
CO₂ per tonne-km
47.81 g Declaredmedian; 47.81–48.93 g
34.11 g Declaredmedian; 33.51–36.58 g
Fuel and CO₂: long haul at 19.3 t, 2022 declarations.
What the numbers actually say
The Scania S 420 A4x2 declared 10.1 l/100 km less (40%) 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 12,120 litres a year, or £16,968. A gap this size is outside the 10% tolerance of declared figures.
