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

Scania R 420 A4x2 vs Scania S 420 A4x2

Scania R 420 A4x2

2022–2026 · 309 kW
25.8l/100 km
median; 24.1–29.2 across 266 declared configurations

Scania S 420 A4x2

2022–2025 · 309 kW
25.2l/100 km
median; 24.7–27 across 29 declared configurations
Scania R 420 A4x2 and Scania S 420 A4x2 side by side
SpecificationScania R 420 A4x2Scania S 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 records2022–2025Registeredcentral 90% of records
Engine power309 kWDeclared309 kWDeclared
Engine displacement12.7 litresDeclared12.7 litresDeclared
GearboxautomatedDeclaredautomatedDeclared
Emission classEURO VI ERegisteredEURO VI ERegistered
Gross vehicle weight18,600–22,000 kgRegisteredmedian 20,500 kg, across 37 type-approval versions and 8 records without one19,000–21,000 kgRegisteredmedian 19,000 kg, across 11 type-approval versions
Kerb weight7,355–8,995 kgRegisteredmedian 8,027 kg, over 612 registrations7,977–8,735 kgRegisteredmedian 8,461 kg, over 81 registrations
Wheelbase3,600–3,950 mmRegisteredmedian 3,750 mm, over 612 registrations3,750–3,950 mmRegisteredmedian 3,750 mm, over 81 registrations
Overall length5,810–6,160 mmRegisteredmedian 5,960 mm, over 612 registrations5,960–6,160 mmRegisteredmedian 5,960 mm, over 81 registrations
Overall height3,530–4,000 mmRegisteredmedian 3,960 mm, over 604 registrations3,770–4,000 mmRegisteredmedian 3,980 mm, over 81 registrations
Declared fuel, long haul25.8 l/100 km Declaredmedian; 24.1–29.2 l/100 km across 266 declared configurations25.2 l/100 km Declaredmedian; 24.7–27 l/100 km across 29 declared configurations
CO₂ per tonne-km34.96 g Declaredmedian; 32.73–39.55 g34.11 g Declaredmedian; 33.51–36.58 g

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

What the numbers actually say

There is 0.6 l/100 km between these two (2.3%). That is inside the 10% tolerance of declared figures, so on fuel alone neither is the better choice: at 120,000 km a year and an assumed £1.40 a litre the gap would be about 720 litres a year (£1,008). The declared figures for one of them alone span 5.1 l/100 km across its configurations, so the specification ordered matters more than the choice between these two.

R 420 A4x2 full specificationS 420 A4x2 full specificationThe fuel ranking

Fuel over a year

120,000 km · assumed price
Scania R 420 A4x230,960 litres
£43,344 at the assumed price
Scania S 420 A4x230,240 litres
£42,336 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.