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S8vsM3Petrol
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  • PerformancePerformance0-100, top speed
  • ConsumptionConsumptionYearly cost
  • SpecsS8 · M3

Audi S8 vs BMW M3 Competition xDrive G80: 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 2022 · 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

Gap39 € per yearin favour of the S8 (−1 %)≈ 18 L petrol 95
BBMW M3 Competition xDrive G80

3,733 €per year

11,5 L/100 km weighted · 24.89 € per 100 km · 1 721 L per year

The verdict changes with your usage
ProfileSplitAA · S8BB · M3Gap
City70 / 25 / 570 % city · 25 % road · 5 % motorway3,780 €4,461 €681 € · S8
Mixed30 / 50 / 2030 % city · 50 % road · 20 % motorway3,694 €3,733 €Nearly level
Long-distance10 / 40 / 5010 % city · 40 % road · 50 % motorway3,523 €3,157 €365 € · M3

Cumulative saving for the S8

1 year
39 €
3 years
118 €
5 years
196 €
10 years
392 €

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

What produces these figures

WLTP combined
11.7 L/100 km · 10.7 L/100 km
Powertrain
Combustion · Combustion
Power
571 ch · 510 ch
Kerb weight
2,220 kg · 1,750 kg

Other similar comparisons

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gap 834 €/year
BMWVSAudi

M3 Competition xDrive vs S5 Avant

gap 1 610 €/year
AudiVSPorsche

S8 vs Panamera Turbo

gap 2 195 €/year
BMWVSAudi

M3 Competition xDrive vs S5 Sedan

gap 1 696 €/year

Frequently asked questions

On a 100 km mixed trip, the Audi S8 and BMW M3 Competition xDrive have a near-identical cost per km with default parameters. The gap becomes significant once you enter your actual energy prices.

The Audi S8 is cheaper across all distances with default rates. If your energy prices differ significantly, simulate to see the real impact on your budget.