Skip to main content
CaralogyCaralogy
HomeBrandsRoad TripBudgetDuelGuides
Caralogy

The car comparison platform. Physics simulation, road trips, real costs.

Navigation
All brandsCar duelRunning costsMotorwayMethodology
Simulators
Motorway simulatorRunning costsPerformance duel
Brands
VolkswagenBMWMercedesToyotaTeslaAudi
FRENDEESIT
© 2026 Caralogy · All rights reserved
  1. Home
  2. /Consumption
  3. /SUV
X3vsS3Petrol
  • MotorwayMotorwayRange and charging
  • PerformancePerformance0-100, top speed
  • ConsumptionConsumptionYearly cost
  • SpecsX3 · S3

BMW X3 M40i G01 vs Audi S3 Sedan: 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.

family SUV · 2021 vs 2026 · 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

ABMW X3 M40i G01

2,747 €per year

8,4 L/100 km weighted · 18.31 € per 100 km · 1 266 L per year

Gap39 € per yearin favour of the S3 Sedan (−1 %)≈ 18 L petrol 95
BAudi S3 Sedan

2,708 €per year

8,3 L/100 km weighted · 18.05 € per 100 km · 1 248 L per year

The verdict changes with your usage
ProfileSplitAA · X3BB · S3Gap
City70 / 25 / 570 % city · 25 % road · 5 % motorway3,030 €2,728 €303 € · S3
Mixed30 / 50 / 2030 % city · 50 % road · 20 % motorway2,747 €2,708 €Nearly level
Long-distance10 / 40 / 5010 % city · 40 % road · 50 % motorway2,532 €2,669 €137 € · X3

Cumulative saving for the S3 Sedan

1 year
39 €
3 years
117 €
5 years
195 €
10 years
390 €

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

What produces these figures

WLTP combined
8.1 L/100 km · 8.4 L/100 km
Powertrain
Combustion · Combustion
Power
360 ch · 333 ch
Kerb weight
1,870 kg · 1,535 kg

Other similar comparisons

BMWVSPorsche

X3 M40i vs Macan GTS

gap 1 710 €/year
BMWVSAudi

M140i vs S3 Sedan

gap 230 €/year
BMWVSPorsche

X3 M40i vs Macan GTS

gap 816 €/year
BMWVSAudi

M140i xDrive vs S3 Sedan

gap 30 €/year

Frequently asked questions

On a 100 km mixed trip, the BMW X3 M40i and Audi S3 Sedan have a near-identical cost per km with default parameters. The gap becomes significant once you enter your actual energy prices.

The Audi S3 Sedan is cheaper across all distances with default rates. If your energy prices differ significantly, simulate to see the real impact on your budget.