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AA4 40DieselvsB318dHybrid
  • MotorwayMotorwayRange and charging
  • PerformancePerformance0-100, top speed
  • ConsumptionConsumptionYearly cost
  • SpecsA4 40 · 318d

Audi A4 40 TDI vs BMW 318d Touring Steptronic G20: 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.

saloon · 2020 vs 2021 · Methodology
AudiDieselFaster

A4 40 TDI

190 hp · 400 Nm · 1,575 kg · 2020

VS
BMWHybrid

318d Touring Steptronic G20

150 hp · 320 Nm · 1,630 kg · 2021

Result · 0–100 km/h

AAudi A4 40 TDI

7.79 s

Gap0.80 sin favour of A4 40 TDI
BBMW 318d Touring Steptronic G20

8.59 s

Summary · Caralogy simulation
MeasureA4 40 TDI318d Touring Steptronic G20Gap
0–100 km/h7.79 s8.59 s0.80 s · A4 40 TDI
400 m standing start15.77 s16.17 s0.40 s · A4 40 TDI
1,000 m standing start28.09 s29.97 s1.88 s · A4 40 TDI
Top speed (electronically limited)242 km/h215 km/h27 km/h · A4 40 TDI
Power-to-weight ratio8.29 kg/hp10.87 kg/hpbetter ratio · A4 40 TDI

Watch the race

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

AudiDieselA4 40 TDI
Speed
0km/h
Timer
0,00s
Distance
0m
BMWHybrid318d Touring Steptronic G20
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.
StageA4 40 TDI318d Touring Steptronic G20
0–30 km/h2.16 s1.35 s
0–50 km/h3.61 s2.64 s
0–80 km/h5.84 s5.73 s · tight gap
0–100 km/h7.79 s8.59 s
0–120 km/h10.28 s12.35 s
0–160 km/h17.57 s24.00 s
0–200 km/h30.63 s51.06 s
400 m standing start15.77 s16.17 s
1,000 m standing start28.09 s29.97 s
Top speed242 km/h215 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

A4 40 TDI

8,29kg/hpratio better by 2,58 kg/hp
CharacteristicValueDetail
Power190 hpPending
Torque400 Nm
Weight1 575 kgmanufacturer kerb weight
DrivetrainTraction
Gearbox7-speed S tronic
BMW

318d Touring Steptronic G20

10,87kg/hpcompensated by −55 kg
CharacteristicValueDetail
Power150 hp4 cyl
Torque320 Nm
Weight1 630 kgmanufacturer kerb weight
Drivetrain-
GearboxEight-speed Steptronic

The start: 0 to 100 km/h

Off the line, the A4 40 TDI hits 100 km/h in 7.79 s versus 8.59 s for the 318d Touring Steptronic. Despite the faster sprint time, the 318d Touring Steptronic is 12 m further along the track at this moment: stronger low-speed acceleration offsets a slower run beyond 100 km/h.

From 100 km/h to 400 metres

At 200 metres, the 318d Touring Steptronic is doing 110 km/h against 122 km/h for the A4 40 TDI. The gap is 0.19 s. The challenger starts to claw back ground.

At 400 metres standing start, the A4 40 TDI crosses the line in 15.77 s versus 16.17 s. The 0.40 s gap represents roughly 15 m of track - two to three car lengths.

Beyond 400 metres: top speed comes into play

Past 400 metres, the A4 40 TDI continues to build its lead. At 600 metres, it runs at 171 km/h versus 152 km/h. At 1,000 metres, the A4 40 TDI finishes in 28.08 s versus 29.97 s, with a 1.89 s lead.

What the numbers don’t tell you

Electronically capped at 215 km/h, the 318d Touring Steptronic never reaches its natural aerodynamic ceiling in this duel. That’s not a physical limit of the motor - it’s a deliberate manufacturer decision, typically tied to standard-fit tyre ratings or model-range positioning.

With two combustion powertrains, the difference comes down to power-to-weight ratio (8.29 kg/hp vs 10.87 kg/hp) and transmission (Automatic vs Automatic).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 14.62 seconds. The 0.80 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 A4 40 TDI
Audi A5 Sedan
Instead of 318d Touring Steptronic G20
BMW 318d TouringBMW 320d Touring

Other duels you might be interested in

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A4 40 TDI vs 320d

AudiVSBMW

A5 Avant vs 318d Touring Steptronic

Frequently asked questions

Over 0–100 km/h, A4 40 TDI wins (7,79 s vs 8,59 s).

A4 40 TDI goes from 0 to 100 km/h in 7,79 seconds (calibrated simulation).

A4 40 TDI: 190 hp, ratio 8,29 kg/hp. 318d Touring Steptronic G20: 150 hp, ratio 10,87 kg/hp.

A4 40 TDI: 242 km/h. 318d Touring Steptronic G20: 215 km/h.