Comparison · 6×2 tractor unit · long haul at 19.3 t

Scania R 650 A6x2/4 vs Scania S 650 A6x2, tractor unit (2019–2021)

Scania R 650 A6x2/4

2019–2022 · 478 kW

32.7l/100 km

median; 31.3–35.9 across 10 declared configurations

Scania S 650 A6x2, tractor unit (2019–2021)

2019–2021 · 478 kW

35.2l/100 km

median; 34.5–37.8 across 3 declared configurations

Scania R 650 A6x2/4 and Scania S 650 A6x2, tractor unit (2019–2021) side by side
Specification	Scania R 650 A6x2/4	Scania S 650 A6x2, tractor unit (2019–2021)
Vehicle form	Tractor unit for semi-trailer (BC)Registered	Tractor unit for semi-trailer (BC)Registered
Axle configuration	6×2Declared	6×2Declared
Registered new	2019–2022Registeredcentral 90% of records	2019–2021Registeredcentral 90% of records
Engine power	478 kWDeclared	478 kWDeclared
Engine displacement	16.4 litresDeclared	16.4 litresDeclared
Gearbox	automated, manualDeclared	automatedDeclared
Emission class	Not recorded	EURO 6Registered
Gross vehicle weight	25,300–29,000 kgDeclaredmedian 27,000 kg, across 59 declared configurations	27,000 kgRegistered
Kerb weight	Not recorded	17,461 kgRegistered
Wheelbase	Not recorded	4,650 mmRegistered
Overall length	Not recorded	7,100 mmRegistered
Declared fuel, long haul	32.7 l/100 km Declaredmedian; 31.3–35.9 l/100 km across 10 declared configurations	35.2 l/100 km Declaredmedian; 34.5–37.8 l/100 km across 3 declared configurations
CO₂ per tonne-km	44.3 g Declaredmedian; 42.4–48.7 g	47.7 g Declaredmedian; 46.8–51.3 g

Fuel and CO₂: long haul at 19.3 t, 2021 declarations.

What the numbers actually say

There is 2.5 l/100 km between these two (7.6%). 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 3,000 litres a year (£4,200). The declared figures for one of them alone span 4.6 l/100 km across its configurations, so the specification ordered matters more than the choice between these two.

R 650 A6x2/4 full specification S 650 A6x2, tractor unit (2019–2021) full specification The fuel ranking

Fuel over a year

120,000 km · assumed price

Scania R 650 A6x2/439,240 litres

£54,936 at the assumed price

Scania S 650 A6x2, tractor unit (2019–2021)42,240 litres

£59,136 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.