AllTruckData
Comparison · 6×4 tractor unit · long haul at 19.3 t

Scania R 660 A6x4 vs Scania S 650 A6x4

Lower declared fuel

Scania R 660 A6x4

2021–2023 · 485 kW
34l/100 km
median; 31.7–38.9 across 83 declared configurations

Scania S 650 A6x4

2019–2021 · 478 kW
38.3l/100 km
median; 35–39.8 across 6 declared configurations
Scania R 660 A6x4 and Scania S 650 A6x4 side by side
SpecificationScania R 660 A6x4Scania S 650 A6x4
Vehicle formTractor unit for semi-trailer (BC)RegisteredTractor unit for semi-trailer (BC)Registered
Axle configuration6×4Declared6×4Declared
Registered new2021–2023Registeredcentral 90% of records2019–2021Registeredcentral 90% of records
Engine power485 kWDeclared478 kWDeclared
Engine displacement16.4 litresDeclared16.4 litresDeclared
GearboxautomatedDeclaredautomatedDeclared
Emission classEURO VI, EURO VI ERegisteredEURO VI, EURO VI C, EURO VI DRegistered
Gross vehicle weight28,500–36,000 kgRegisteredmedian 30,000 kg, across 7 type-approval versions and 4 records without one28,000–36,000 kgRegisteredmedian 30,000 kg, across 1 type-approval version and 7 records without one
Kerb weight10,003–15,108 kgRegisteredmedian 10,507 kg, over 11 registrations10,235–15,140 kgRegisteredmedian 10,605 kg, over 8 registrations
Wheelbase4,300–5,300 mmRegisteredmedian 4,700 mm, over 11 registrations4,450–5,100 mmRegisteredmedian 4,500 mm, over 8 registrations
Overall length6,670–7,560 mmRegisteredmedian 7,060 mm, over 11 registrations6,700–7,420 mmRegisteredmedian 6,900 mm, over 8 registrations
Overall height3,560–4,000 mmRegisteredmedian 3,760 mm, over 10 registrations3,900–4,000 mmRegisteredmedian 3,980 mm, over 3 registrations
Declared fuel, long haul34 l/100 km Declaredmedian; 31.7–38.9 l/100 km across 83 declared configurations38.3 l/100 km Declaredmedian; 35–39.8 l/100 km across 6 declared configurations
CO₂ per tonne-km46.04 g Declaredmedian; 42.98–52.71 g51.9 g Declaredmedian; 47.5–53.9 g

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

What the numbers actually say

The Scania R 660 A6x4 declared 4.3 l/100 km less (12.6%) 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 5,160 litres a year, or £7,224. A gap this size is outside the 10% tolerance of declared figures.

R 660 A6x4 full specificationS 650 A6x4 full specificationThe fuel ranking

Fuel over a year

120,000 km · assumed price
Scania R 660 A6x440,800 litres
£57,120 at the assumed price
Scania S 650 A6x445,960 litres
£64,344 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.