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S8vsM135iPetrol
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  • PerformancePerformance0-100, top speed
  • ConsumptionConsumptionYearly cost
  • SpecsS8 · M135i

Audi S8 vs BMW M135i xDrive F40: which is cheaper to run?

What each kilometre costs, depending on your driving profile and how you charge. Annual projection and cumulative savings over 10 years.

limousine · 2025 vs 2021 · 15,000 km/an · Mixed · Petrol 95 2.17 €/L · Methodology
Annual mileage
15,000 km
5,000 km50,000 km
Driving mix

30 % City · 50 % Road · 20 % Motorway

Fuel price
Petrol 95 2.17 €/L · Diesel 2.38 €/Lprix-carburants.gouv.fr — moyenne nationale du 05/10/2026 ; EDF Tarif Bleu Base au 01/08/2026 ; DC autoroute : moyenne des réseaux sans abonnement

Result · yearly energy cost

AAudi S8

3,694 €per year

11,3 L/100 km weighted · 24.63 € per 100 km · 1 702 L per year

Gap1,419 € per yearin favour of the M135i xDrive (−38 %)≈ 654 L petrol 95
BBMW M135i xDrive F40

2,275 €per year

7,0 L/100 km weighted · 15.17 € per 100 km · 1 049 L per year

The verdict changes with your usage
ProfileSplitAA · S8BB · M135iGap
City70 / 25 / 570 % city · 25 % road · 5 % motorway3,780 €2,510 €1,271 € · M135i
Mixed30 / 50 / 2030 % city · 50 % road · 20 % motorway3,694 €2,275 €1,419 € · M135i
Long-distance10 / 40 / 5010 % city · 40 % road · 50 % motorway3,523 €2,099 €1,423 € · M135i

Cumulative saving for the M135i xDrive

1 year
1,419 €
3 years
4,257 €
5 years
7,095 €
10 years
14,191 €

Energy only. Excludes purchase, insurance, servicing, depreciation.

What produces these figures

WLTP combined
11.7 L/100 km · 6.7 L/100 km
Powertrain
Combustion · Combustion
Power
571 ch · 306 ch
Kerb weight
2,220 kg · 1,525 kg

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Frequently asked questions

On a 100 km mixed trip, the BMW M135i xDrive is about 40% cheaper than the Audi S8 with default parameters. This ratio shifts with your actual energy prices - simulate for your profile.

The BMW M135i xDrive is cheaper across all distances with default rates. If your energy prices differ significantly, simulate to see the real impact on your budget.