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. /Duel
  3. /Hatchbacks
AS3PetrolvsB125dDiesel
  • MotorwayMotorwayRange and charging
  • PerformancePerformance0-100, top speed
  • ConsumptionConsumptionYearly cost
  • SpecsS3 · 125d

Audi S3 Sedan vs BMW 125d F20LCI: which is truly faster?

Simulated drag race 0 → 1,000 m in real time. Synchronised speed counters and stopwatch. Physics calibration on 7 manufacturer measurements.

compact · 2026 vs 2018 · Methodology
AudiPetrolFaster

S3 Sedan

333 hp · 420 Nm · 1,535 kg · 2026

VS
BMWDiesel

125d F20LCI

224 hp · 450 Nm · 1,480 kg · 2018

Result · 0–100 km/h

AAudi S3 Sedan

4.63 s

Gap1.85 sin favour of S3 Sedan
BBMW 125d F20LCI

6.48 s

Summary · Caralogy simulation
MeasureS3 Sedan125d F20LCIGap
0–100 km/h4.63 s6.48 s1.85 s · S3 Sedan
400 m standing start13.08 s14.68 s1.60 s · S3 Sedan
1,000 m standing start23.69 s26.40 s2.71 s · S3 Sedan
Top speed (electronically limited)250 km/h240 km/h10 km/h · S3 Sedan
Power-to-weight ratio4.61 kg/hp6.61 kg/hpbetter ratio · S3 Sedan

Watch the race

Standing-start drag race, calibrated on manufacturer splits. The gap shows at each stage.

AudiPetrolS3 Sedan
Speed
0km/h
Timer
0,00s
Distance
0m
BMWDiesel125d F20LCI
Speed
0km/h
Timer
0,00s
Distance
0m
100 m
200 m
300 m
400 m
500 m
600 m
700 m
800 m
900 m
1000 m
0m → 1000m
Gap0m

Stage-by-stage comparison

Simulated performance at each stage. Best value in bold.
StageS3 Sedan125d F20LCI
0–30 km/h1.20 s1.88 s
0–50 km/h2.00 s3.03 s
0–80 km/h3.37 s4.83 s
0–100 km/h4.63 s6.48 s
0–120 km/h6.64 s8.57 s
0–160 km/h10.96 s14.58 s
0–200 km/h17.37 s25.23 s
400 m standing start13.08 s14.68 s
1,000 m standing start23.69 s26.40 s
Top speed limited250 km/h240 km/h

Parameters and assumptions

Simulation

Start
Standing, straight line
Surface
Dry asphalt, 23°C
Wind
None
Driver
1 person, 75 kg

Calibration

Splits
0–100, 0–200 manufacturer
Power curve
Real measurement (Caralogy)
VMax
Manufacturer limited
Transmission
Losses integrated in model

Physics model calibrated on manufacturer splits. The limited top speed is not the real aerodynamic top speed of the vehicles.

Under the bonnet

Manufacturer technical specifications. The power-to-weight ratio is the key physical factor in a drag race.

Audi

S3 Sedan

4,61kg/hpratio better by 2,00 kg/hp
CharacteristicValueDetail
Power333 hpPending
Torque420 Nm
Weight1 535 kgmanufacturer kerb weight
DrivetrainIntegrale (AWD)
Gearbox7-speed S tronic
BMW

125d F20LCI

6,61kg/hpcompensated by −55 kg
CharacteristicValueDetail
Power224 hp4 cyl
Torque450 Nm
Weight1 480 kgmanufacturer kerb weight
Drivetrain-
Gearbox8-speed Steptronic

The start: 0 to 100 km/h

Off the line, the S3 Sedan hits 100 km/h in 4.63 s versus 6.48 s for the 125d. At this point, the S3 Sedan leads by 1.85 s and sits roughly 22 m ahead.

From 100 km/h to 400 metres

At 200 metres, the S3 Sedan is doing 138 km/h against 130 km/h for the 125d. The gap is 1.22 s. The challenger starts to claw back ground.

At 400 metres standing start, the S3 Sedan crosses the line in 13.08 s versus 14.67 s. The 1.60 s gap represents roughly 69 m of track - a gap visible to the naked eye.

Beyond 400 metres: top speed comes into play

Past 400 metres, the S3 Sedan continues to build its lead. At 600 metres, it runs at 198 km/h versus 180 km/h. At 1,000 metres, the S3 Sedan finishes in 23.69 s versus 26.39 s, with a 2.71 s lead. Both vehicles have similar top speeds (250 (i.e. 155 mph - industry threshold) vs 240 km/h), preventing any comeback.

What the numbers don’t tell you

Both rivals are electronically governed, but not at the same level: the S3 Sedan is capped at 250 (i.e. 155 mph - industry threshold) km/h, the 125d at 240 km/h. This isn’t a physical engine limit - it’s a manufacturer choice, usually for tyre safety or homologation reasons. Neither car reaches its true aerodynamic top speed.

With two combustion powertrains, the difference comes down to power-to-weight ratio (4.61 kg/hp vs 6.61 kg/hp) and transmission (Automatic vs Automatic).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 9.81 seconds. The 1.85 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.

Compare with other alternatives

Swap one of the two models to explore an equivalent duel in the same segment.

Instead of 125d F20LCI
BMW 128tiBMW 128ti

Other duels you might be interested in

BMWVSAudi

M140i vs S3 Sedan

BMWVSAudi

125d vs A3 Sedan

BMWVSAudi

M140i xDrive vs S3 Sedan

BMWVSAudi

125d vs A3 Sportback

Frequently asked questions

Over 0–100 km/h, S3 Sedan wins (4,63 s vs 6,48 s).

S3 Sedan goes from 0 to 100 km/h in 4,63 seconds (calibrated simulation).

S3 Sedan: 333 hp, ratio 4,61 kg/hp. 125d F20LCI: 224 hp, ratio 6,61 kg/hp.

S3 Sedan: 250 km/h. 125d F20LCI: 240 km/h.