Comparison · 4×2 lorry · long haul at 14 t
Iveco S-Way, 309 kW, 4x2 rigid lorry vs Mercedes-Benz Arocs, 315 kW, 4x2 rigid lorry
Iveco S-Way, 309 kW, 4x2 rigid lorry
2020–2023 · 309 kW
32.2l/100 km
median; 30.4–39.6 across 45 declared configurations
Mercedes-Benz Arocs, 315 kW, 4x2 rigid lorry
2020–2023 · 315 kW
34.5l/100 km
median; 32.3–42 across 13 declared configurations
What the numbers actually say
There is 2.3 l/100 km between these two (7.1%). 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 2,760 litres a year (£3,864). The declared figures for one of them alone span 9.7 l/100 km across its configurations, so the specification ordered matters more than the choice between these two.
Fuel over a year
120,000 km · assumed priceIveco S-Way, 309 kW, 4x2 rigid lorry38,640 litres
£54,096 at the assumed price
Mercedes-Benz Arocs, 315 kW, 4x2 rigid lorry41,400 litres
£57,960 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.