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

Scania R 660 A4x2 vs Scania R 770 A4x2

Scania R 660 A4x2

2021–2024 · 485 kW
29.5l/100 km
median; 27.6–32.1 across 92 declared configurations

Scania R 770 A4x2

2021–2025 · 566 kW
31.3l/100 km
median; 29.2–34.2 across 15 declared configurations
Scania R 660 A4x2 and Scania R 770 A4x2 side by side
SpecificationScania R 660 A4x2Scania R 770 A4x2
Vehicle formTractor unit for semi-trailer (BC)RegisteredTractor unit for semi-trailer (BC)Registered
Axle configuration4×2Declared4×2Declared
Registered new2021–2024Registeredcentral 90% of records2021–2025Registeredcentral 90% of records
Engine power485 kWDeclared566 kWDeclared
Engine displacement16.4 litresDeclared16.4 litresDeclared
GearboxautomatedDeclaredautomatedDeclared
Emission classEURO VI D, EURO VI ERegisteredEURO VI ERegistered
Gross vehicle weight19,000–23,000 kgRegisteredmedian 21,000 kg, across 21 type-approval versions and 3 records without one19,500–22,000 kgRegisteredmedian 22,000 kg, across 4 type-approval versions and 1 record without one
Kerb weight8,210–9,430 kgRegisteredmedian 8,689 kg, over 36 registrations8,607–9,085 kgRegisteredmedian 8,695 kg, over 5 registrations
Wheelbase3,750–3,950 mmRegisteredmedian 3,950 mm, over 36 registrations3,750–3,950 mmRegisteredmedian 3,750 mm, over 5 registrations
Overall length5,960–8,200 mmRegisteredmedian 6,160 mm, over 36 registrations5,960–6,160 mmRegisteredmedian 6,120 mm, over 5 registrations
Overall height3,460–4,000 mmRegisteredmedian 3,900 mm, over 34 registrations3,500–4,000 mmRegisteredmedian 3,800 mm, over 3 registrations
Declared fuel, long haul29.5 l/100 km Declaredmedian; 27.6–32.1 l/100 km across 92 declared configurations31.3 l/100 km Declaredmedian; 29.2–34.2 l/100 km across 15 declared configurations
CO₂ per tonne-km40.03 g Declaredmedian; 37.48–43.52 g42.39 g Declaredmedian; 39.55–46.4 g

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

What the numbers actually say

There is 1.8 l/100 km between these two (6.1%). 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 2,160 litres a year (£3,024). The declared figures for one of them alone span 5 l/100 km across its configurations, so the specification ordered matters more than the choice between these two.

R 660 A4x2 full specificationR 770 A4x2 full specificationThe fuel ranking

Fuel over a year

120,000 km · assumed price
Scania R 660 A4x235,400 litres
£49,560 at the assumed price
Scania R 770 A4x237,560 litres
£52,584 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.