AllTruckData
Comparison · 4×2 tractor unit · long haul at 19.3 t

Mercedes-Benz Arocs, 310 kW, 4x2 tractor unit vs Scania S 420 A4x2

Mercedes-Benz Arocs, 310 kW, 4x2 tractor unit

2019–2023 · 310 kW
35.3l/100 km
median; 35.3–36.1 across 5 declared configurations
Lower declared fuel

Scania S 420 A4x2

2022–2025 · 309 kW
25.2l/100 km
median; 24.7–27 across 29 declared configurations
Mercedes-Benz Arocs, 310 kW, 4x2 tractor unit and Scania S 420 A4x2 side by side
SpecificationMercedes-Benz Arocs, 310 kW, 4x2 tractor unitScania S 420 A4x2
Vehicle formTractor unit for semi-trailer (BC)RegisteredTractor unit for semi-trailer (BC)Registered
Axle configuration4×2Declared4×2Declared
Registered new2019–2023Registeredcentral 90% of records2022–2025Registeredcentral 90% of records
Engine power310 kWDeclared309 kWDeclared
Engine displacement12.8 litresDeclared12.7 litresDeclared
GearboxautomatedDeclaredautomatedDeclared
Emission classEURO VI DRegisteredEURO VI ERegistered
Gross vehicle weight18,000 kgRegistered19,000–21,000 kgRegisteredmedian 19,000 kg, across 11 type-approval versions
Kerb weight7,529 kgRegistered7,977–8,735 kgRegisteredmedian 8,461 kg, over 81 registrations
Wheelbase3,900 mmRegistered3,750–3,950 mmRegisteredmedian 3,750 mm, over 81 registrations
Overall length6,200 mmRegistered5,960–6,160 mmRegisteredmedian 5,960 mm, over 81 registrations
Overall heightNot recorded3,770–4,000 mmRegisteredmedian 3,980 mm, over 81 registrations
Declared fuel, long haul35.3 l/100 km Declaredmedian; 35.3–36.1 l/100 km across 5 declared configurations25.2 l/100 km Declaredmedian; 24.7–27 l/100 km across 29 declared configurations
CO₂ per tonne-km47.81 g Declaredmedian; 47.81–48.93 g34.11 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.

Arocs, 310 kW, 4x2 tractor unit full specificationS 420 A4x2 full specificationThe fuel ranking

Fuel over a year

120,000 km · assumed price
Mercedes-Benz Arocs, 310 kW, 4x2 tractor unit42,360 litres
£59,304 at the assumed price
Scania S 420 A4x230,240 litres
£42,336 at the assumed price
At 120,000 km a year and an assumed £1.40 a litre; the price is an assumption, not one we track.