median; 32.5–36.2 across 8 declared configurations
Iveco Stralis, 294 kW, 4x2 tractor unit (2019–2020) and Volvo FM, 278 kW, 4x2 tractor unit (2016–2019) side by side
Specification
Iveco Stralis, 294 kW, 4x2 tractor unit (2019–2020)
Volvo FM, 278 kW, 4x2 tractor unit (2016–2019)
Vehicle form
Tractor unit (BC)Registered
Tractor unit (BC)Registered
Axle configuration
4×2Declared
4×2Declared
Registered new
2019–2020Registeredcentral 90% of records
2016–2019Registeredcentral 90% of records
Engine power
294 kWDeclared
278 kWDeclared
Engine displacement
8.7 litresDeclared
10.8 litresDeclared
Gearbox
automated, manualDeclared
automatedDeclared
Emission class
Not recorded
EURO VI B, EURO VI CRegistered
Gross vehicle weight
19,000–20,000 kgDeclaredmedian 20,000 kg, across 53 declared configurations
19,000–22,000 kgRegisteredmedian 20,500 kg, across 27 type-approval versions and 2 records without one
Kerb weight
Not recorded
6,854–11,075 kgRegisteredmedian 7,379 kg, over 147 registrations
Wheelbase
Not recorded
3,700–4,000 mmRegisteredmedian 3,800 mm, over 147 registrations
Overall length
Not recorded
5,890–6,210 mmRegisteredmedian 5,990 mm, over 147 registrations
Overall height
Not recorded
3,100–3,910 mmRegisteredmedian 3,880 mm, over 46 registrations
Declared fuel, long haul
38.5 l/100 km Declaredmedian; 34.6–39.3 l/100 km across 8 declared configurations
32.9 l/100 km Declaredmedian; 32.5–36.2 l/100 km across 8 declared configurations
CO₂ per tonne-km
52.2 g Declaredmedian; 47–53.2 g
44.7 g Declaredmedian; 44–49 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 5.6 l/100 km less (17%) 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 6,720 litres a year, or £9,408. A gap this size is outside the 10% tolerance of declared figures.
