Comparison · 8×4 lorry · construction at 12.9 t

Volvo FH, 413 kW, 8x4 rigid lorry vs Volvo FM, 405 kW, 8x4 rigid lorry (2017–2023)

Volvo FH, 413 kW, 8x4 rigid lorry

2020–2023 · 413 kW
46.4l/100 km
median; 45.5–49.8 across 16 declared configurations
Lower declared fuel

Volvo FM, 405 kW, 8x4 rigid lorry (2017–2023)

2017–2023 · 405 kW
41.8l/100 km
median; 40.9–43.6 across 4 declared configurations
Volvo FH, 413 kW, 8x4 rigid lorry and Volvo FM, 405 kW, 8x4 rigid lorry (2017–2023) side by side
SpecificationVolvo FH, 413 kW, 8x4 rigid lorryVolvo FM, 405 kW, 8x4 rigid lorry (2017–2023)
Vehicle formLorry (BA)RegisteredLorry (BA)Registered
Axle configuration8×4Declared8×4Declared
Registered new2020–2023Registeredcentral 90% of records2017–2023Registeredcentral 90% of records
Engine power413 kWDeclared405 kWDeclared
Engine displacement16.1 litresDeclared12.8 litresDeclared
GearboxautomatedDeclaredautomatedDeclared
Emission classNot recordedEURO 6, EURO VI, EURO VI B, EURO VI C, EURO VI D, EURO VI ERegistered
Gross vehicle weight36,000–40,000 kgDeclaredmedian 39,000 kg, across 59 declared configurations39,000–46,000 kgRegisteredmedian 43,000 kg, over 23 registrations
Kerb weightNot recorded10,300–28,054 kgRegisteredmedian 17,955 kg, over 23 registrations
WheelbaseNot recorded6,100–7,950 mmRegisteredmedian 6,700 mm, over 23 registrations
Overall lengthNot recorded8,680–10,900 mmRegisteredmedian 9,630 mm, over 23 registrations
Overall heightNot recorded3,550–3,950 mmRegisteredmedian 3,760 mm, over 10 registrations
Declared fuel, construction46.4 l/100 km Declaredmedian; 45.5–49.8 l/100 km across 16 declared configurations41.8 l/100 km Declaredmedian; 40.9–43.6 l/100 km across 4 declared configurations
CO₂ per tonne-km94.14 g Declaredmedian; 92.28–101 g84.8 g Declaredmedian; 83.02–88.42 g

Fuel and CO₂: construction at 12.9 t, 2022 declarations.

What the numbers actually say

The Volvo FM, 405 kW, 8x4 rigid lorry (2017–2023) declared 4.6 l/100 km less (11%) on the construction at 12.9 t, 2022 declarations. At 120,000 km a year and an assumed £1.40 a litre, that is about 5,520 litres a year, or £7,728. A gap this size is outside the 10% tolerance of declared figures.

Fuel over a year

120,000 km · assumed price
Volvo FH, 413 kW, 8x4 rigid lorry55,680 litres
£77,952 at the assumed price
Volvo FM, 405 kW, 8x4 rigid lorry (2017–2023)50,160 litres
£70,224 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.