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

Scania P 420 A4x2 vs Scania R 420 A4x2

Scania P 420 A4x2

2022–2026 · 309 kW
28.6l/100 km
median; 25.8–32.3 across 26 declared configurations
Lower declared fuel

Scania R 420 A4x2

2022–2026 · 309 kW
25.8l/100 km
median; 24.1–29.2 across 266 declared configurations
Scania P 420 A4x2 and Scania R 420 A4x2 side by side
SpecificationScania P 420 A4x2Scania R 420 A4x2
Vehicle formTractor unit for semi-trailer (BC)RegisteredTractor unit for semi-trailer (BC)Registered
Axle configuration4×2Declared4×2Declared
Registered new2022–2026Registeredcentral 90% of records2022–2026Registeredcentral 90% of records
Engine power309 kWDeclared309 kWDeclared
Engine displacement12.7 litresDeclared12.7 litresDeclared
GearboxautomatedDeclaredautomatedDeclared
Emission classEURO VI ERegisteredEURO VI ERegistered
Gross vehicle weight19,000–22,000 kgRegisteredmedian 19,500 kg, across 9 type-approval versions and 2 records without one18,600–22,000 kgRegisteredmedian 20,500 kg, across 37 type-approval versions and 8 records without one
Kerb weight7,202–10,359 kgRegisteredmedian 7,564 kg, over 25 registrations7,355–8,995 kgRegisteredmedian 8,027 kg, over 612 registrations
Wheelbase3,350–3,950 mmRegisteredmedian 3,750 mm, over 25 registrations3,600–3,950 mmRegisteredmedian 3,750 mm, over 612 registrations
Overall length5,560–6,150 mmRegisteredmedian 5,960 mm, over 25 registrations5,810–6,160 mmRegisteredmedian 5,960 mm, over 612 registrations
Overall height3,350–3,730 mmRegisteredmedian 3,500 mm, over 24 registrations3,530–4,000 mmRegisteredmedian 3,960 mm, over 604 registrations
Declared fuel, long haul28.6 l/100 km Declaredmedian; 25.8–32.3 l/100 km across 26 declared configurations25.8 l/100 km Declaredmedian; 24.1–29.2 l/100 km across 266 declared configurations
CO₂ per tonne-km38.75 g Declaredmedian; 35.04–43.82 g34.96 g Declaredmedian; 32.73–39.55 g

Fuel and CO₂: long haul at 19.3 t, 2022 declarations.

What the numbers actually say

The Scania R 420 A4x2 declared 2.8 l/100 km less (10.8%) 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 3,360 litres a year, or £4,704. A gap this size is outside the 10% tolerance of declared figures.

Fuel over a year

120,000 km · assumed price
Scania P 420 A4x234,320 litres
£48,048 at the assumed price
Scania R 420 A4x230,960 litres
£43,344 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.