AllTruckData
Comparison · 4×2 tractor unit · long haul at 19.3 t

Volvo FM, 278 kW, 4x2 tractor unit (2016–2019) vs Volvo FM, 308 kW, 4x2 tractor unit (2016–2019)

Lower declared fuel

Volvo FM, 278 kW, 4x2 tractor unit (2016–2019)

2016–2019 · 278 kW
32.9l/100 km
median; 32.5–36.2 across 8 declared configurations

Volvo FM, 308 kW, 4x2 tractor unit (2016–2019)

2016–2019 · 308 kW
36.5l/100 km
median; 32.5–39.8 across 20 declared configurations
Volvo FM, 278 kW, 4x2 tractor unit (2016–2019) and Volvo FM, 308 kW, 4x2 tractor unit (2016–2019) side by side
SpecificationVolvo FM, 278 kW, 4x2 tractor unit (2016–2019)Volvo FM, 308 kW, 4x2 tractor unit (2016–2019)
Vehicle formTractor unit for semi-trailer (BC)RegisteredTractor unit for semi-trailer (BC)Registered
Axle configuration4×2Declared4×2Declared
Registered new2016–2019Registeredcentral 90% of records2016–2019Registeredcentral 90% of records
Engine power278 kWDeclared308 kWDeclared
Engine displacement10.8 litresDeclared10.8 litresDeclared
GearboxautomatedDeclaredautomatedDeclared
Emission classEURO VI B, EURO VI CRegisteredEURO 6, EURO VI B, EURO VI CRegistered
Gross vehicle weight19,000–22,000 kgRegisteredmedian 20,500 kg, across 27 type-approval versions and 2 records without one18,800–22,000 kgRegisteredmedian 20,500 kg, across 49 type-approval versions and 7 records without one
Kerb weight6,854–11,075 kgRegisteredmedian 7,379 kg, over 147 registrations6,487–7,964 kgRegisteredmedian 7,296 kg, over 181 registrations
Wheelbase3,700–4,000 mmRegisteredmedian 3,800 mm, over 147 registrations3,500–3,800 mmRegisteredmedian 3,800 mm, over 181 registrations
Overall length5,890–6,210 mmRegisteredmedian 5,990 mm, over 147 registrations5,680–6,210 mmRegisteredmedian 5,990 mm, over 181 registrations
Overall height3,100–3,910 mmRegisteredmedian 3,880 mm, over 46 registrations3,360–3,890 mmRegisteredmedian 3,850 mm, over 72 registrations
Declared fuel, long haul32.9 l/100 km Declaredmedian; 32.5–36.2 l/100 km across 8 declared configurations36.5 l/100 km Declaredmedian; 32.5–39.8 l/100 km across 20 declared configurations
CO₂ per tonne-km44.7 g Declaredmedian; 44–49 g49.5 g Declaredmedian; 44–53.9 g

Fuel and CO₂: long haul at 19.3 t, 2019 declarations.

What the numbers actually say

The Volvo FM, 278 kW, 4x2 tractor unit (2016–2019) declared 3.6 l/100 km less (10.9%) on the long haul at 19.3 t, 2019 declarations. At 120,000 km a year and an assumed £1.40 a litre, that is about 4,320 litres a year, or £6,048. A gap this size is outside the 10% tolerance of declared figures.

FM, 278 kW, 4x2 tractor unit (2016–2019) full specificationFM, 308 kW, 4x2 tractor unit (2016–2019) full specificationThe fuel ranking

Fuel over a year

120,000 km · assumed price
Volvo FM, 278 kW, 4x2 tractor unit (2016–2019)39,480 litres
£55,272 at the assumed price
Volvo FM, 308 kW, 4x2 tractor unit (2016–2019)43,800 litres
£61,320 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.