median; 28.7–33.7 across 11 declared configurations
Volvo FH, 315 kW, 6x2 tractor unit (from 2019) and Volvo FM, 315 kW, 6x2 tractor unit side by side
Specification
Volvo FH, 315 kW, 6x2 tractor unit (from 2019)
Volvo FM, 315 kW, 6x2 tractor unit
Vehicle form
Tractor unit (BC)Registered
Tractor unit (BC)Registered
Axle configuration
6×2Declared
6×2Declared
Registered new
2019–2026Registeredcentral 90% of records
2014–2025Registeredcentral 90% of records
Engine power
315 kWDeclared
315 kWDeclared
Engine displacement
12.8 litresDeclared
12.8 litresDeclared
Gearbox
automatedDeclared
automatedDeclared
Emission class
EURO 6, EURO VI D, EURO VI ERegistered
EURO 6, EURO VI B, EURO VI C, EURO VI D, EURO VI ERegistered
Gross vehicle weight
23,500–27,000 kgRegisteredmedian 26,500 kg, across 23 type-approval versions
24,000–30,500 kgRegisteredmedian 27,000 kg, across 12 type-approval versions and 2 records without one
Kerb weight
7,776–9,259 kgRegisteredmedian 8,652 kg, over 74 registrations
8,173–18,105 kgRegisteredmedian 8,548 kg, over 23 registrations
Wheelbase
3,800–4,570 mmRegisteredmedian 4,100 mm, over 74 registrations
3,900–4,870 mmRegisteredmedian 4,100 mm, over 23 registrations
Overall length
6,190–6,750 mmRegisteredmedian 6,510 mm, over 74 registrations
6,310–7,600 mmRegisteredmedian 6,510 mm, over 23 registrations
Overall height
3,430–3,950 mmRegisteredmedian 3,500 mm, over 33 registrations
3,360–3,880 mmRegisteredmedian 3,380 mm, over 6 registrations
Declared fuel, long haul
28.3 l/100 km Declaredmedian; 27.4–35.2 l/100 km across 6 declared configurations
31.3 l/100 km Declaredmedian; 28.7–33.7 l/100 km across 11 declared configurations
CO₂ per tonne-km
38.42 g Declaredmedian; 37.18–47.74 g
42.4 g Declaredmedian; 38.87–45.68 g
Fuel and CO₂: long haul at 19.3 t, 2022 declarations.
What the numbers actually say
The Volvo FH, 315 kW, 6x2 tractor unit (from 2019) declared 3 l/100 km less (10.6%) 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 3,600 litres a year, or £5,040. A gap this size is outside the 10% tolerance of declared figures.
