Comparison · 6×4 lorry · long haul at 19.3 t

Mercedes-Benz Arocs, 375 kW, 6x4 rigid lorry vs Scania R 520 B6x4

Mercedes-Benz Arocs, 375 kW, 6x4 rigid lorry

2021–2023 · 375 kW

41.6l/100 km

median; 36–47.2 across 15 declared configurations

Scania R 520 B6x4

2015–2022 · 382 kW

38.5l/100 km

median; 37.4–40.7 across 5 declared configurations

Mercedes-Benz Arocs, 375 kW, 6x4 rigid lorry and Scania R 520 B6x4 side by side
Specification	Mercedes-Benz Arocs, 375 kW, 6x4 rigid lorry	Scania R 520 B6x4
Vehicle form	Lorry (BA)Registered	Lorry (BA)Registered
Axle configuration	6×4Declared	6×4Declared
Registered new	2021–2023Registeredcentral 90% of records	2015–2022Registeredcentral 90% of records
Engine power	375 kWDeclared	382 kWDeclared
Engine displacement	12.8 litresDeclared	16.4 litresDeclared
Gearbox	automatedDeclared	automated, manualDeclared
Emission class	Not recorded	EURO VI, EURO VI ARegistered
Gross vehicle weight	26,000–33,000 kgDeclaredmedian 26,000 kg, across 69 declared configurations	30,000–35,000 kgRegisteredmedian 30,000 kg, over 4 registrations
Kerb weight	Not recorded	12,165–18,525 kgRegisteredmedian 16,249 kg, over 4 registrations
Wheelbase	Not recorded	5,710–6,250 mmRegisteredmedian 6,050 mm, over 4 registrations
Overall length	Not recorded	8,900–10,400 mmRegisteredmedian 9,910 mm, over 4 registrations
Declared fuel, long haul	41.6 l/100 km Declaredmedian; 36–47.2 l/100 km across 15 declared configurations	38.5 l/100 km Declaredmedian; 37.4–40.7 l/100 km across 5 declared configurations
CO₂ per tonne-km	56.4 g Declaredmedian; 48.86–64 g	52.2 g Declaredmedian; 50.6–55.2 g

Fuel and CO₂: long haul at 19.3 t, 2022 declarations.

What the numbers actually say

There is 3.1 l/100 km between these two (8%). That is inside the 10% tolerance of declared figures, so on fuel alone neither is the better choice: at 120,000 km a year and an assumed £1.40 a litre the gap would be about 3,720 litres a year (£5,208). The declared figures for one of them alone span 11.2 l/100 km across its configurations, so the specification ordered matters more than the choice between these two.

Arocs, 375 kW, 6x4 rigid lorry full specification R 520 B6x4 full specification The fuel ranking

Fuel over a year

120,000 km · assumed price

Mercedes-Benz Arocs, 375 kW, 6x4 rigid lorry49,920 litres

£69,888 at the assumed price

Scania R 520 B6x446,200 litres

£64,680 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.