median; 31.1–36.5 across 12 declared configurations
DAF XD 340 FA and Volvo FMX, 251 kW, 4x2 rigid truck side by side
Specification
DAF XD 340 FA
Volvo FMX, 251 kW, 4x2 rigid truck
Vehicle form
Truck (BA)Registered
Truck (BA)Registered
Axle configuration
4×2Declared
4×2Declared
Registered new
2023–2025Registeredcentral 90% of records
2021–2023Registeredcentral 90% of records
Engine power
251 kWDeclared
251 kWDeclared
Engine displacement
10.8 litresDeclared
10.8 litresDeclared
Gearbox
automated, automaticDeclared
automated, automaticDeclared
Emission class
EURO VI ERegistered
EURO VI ERegistered
Gross vehicle weight
19,500–21,500 kgRegisteredmedian 20,500 kg, across 2 type-approval versions and 70 records without one
22,000 kgRegistered
Kerb weight
8,512–14,148 kgRegisteredmedian 10,740 kg, over 72 registrations
10,803 kgRegistered
Wheelbase
3,800–6,100 mmRegisteredmedian 5,400 mm, over 72 registrations
3,700 mmRegistered
Overall length
6,810–11,250 mmRegisteredmedian 9,700 mm, over 72 registrations
6,750 mmRegistered
Overall height
3,020–4,000 mmRegisteredmedian 3,800 mm, over 69 registrations
3,570 mmRegistered
Declared fuel, long haul
29.5 l/100 km Declaredmedian; 27.3–30.3 l/100 km across 16 declared configurations
33 l/100 km Declaredmedian; 31.1–36.5 l/100 km across 12 declared configurations
CO₂ per tonne-km
55.06 g Declaredmedian; 51.06–56.71 g
61.8 g Declaredmedian; 58.21–68.2 g
Fuel and CO₂: long haul at 14 t, 2022 declarations.
What the numbers actually say
The DAF XD 340 FA declared 3.5 l/100 km less (11.8%) on the long haul at 14 t, 2022 declarations. At 120,000 km a year and an assumed £1.40 a litre, that is about 4,200 litres a year, or £5,880. A gap this size is outside the 10% tolerance of declared figures.
