Comparison · 6×2 tractor unit · long haul at 19.3 t
DAF XF 450 FTG, tractor unit (2018–2023) vs Volvo FM, 323 kW, 6x2 tractor unit
DAF XF 450 FTG, tractor unit (2018–2023)
2018–2023 · 330 kW
28.4l/100 km
median; 28–30.7 across 14 declared configurations
Volvo FM, 323 kW, 6x2 tractor unit
2019–2023 · 323 kW
30.2l/100 km
median; 29.5–33.1 across 3 declared configurations
What the numbers actually say
There is 1.8 l/100 km between these two (6.3%). 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 2,160 litres a year (£3,024). The declared figures for one of them alone span 3.6 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 priceDAF XF 450 FTG, tractor unit (2018–2023)34,080 litres
£47,712 at the assumed price
Volvo FM, 323 kW, 6x2 tractor unit36,240 litres
£50,736 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.