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AA4 40DieselvsB320dHybrid
  • MotorwayMotorwayRange and charging
  • PerformancePerformance0-100, top speed
  • ConsumptionConsumptionYearly cost
  • SpecsA4 40 · 320d

Audi A4 40 TDI vs BMW 320d xDrive 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 2019 · Methodology
AudiDiesel

A4 40 TDI

190 hp · 400 Nm · 1,575 kg · 2020

VS
BMWHybridFaster

320d xDrive G20

190 hp · 400 Nm · 1,540 kg · 2019

Result · 0–100 km/h

AAudi A4 40 TDI

7.79 s

Gap0.83 sin favour of 320d xDrive
BBMW 320d xDrive G20

6.96 s

Summary · Caralogy simulation
MeasureA4 40 TDI320d xDrive G20Gap
0–100 km/h7.79 s6.96 s0.83 s · 320d xDrive G20
400 m standing start15.77 s15.08 s0.69 s · 320d xDrive G20
1,000 m standing start28.09 s27.83 s0.26 s · 320d xDrive G20
Top speed (electronically limited)242 km/h232 km/h10 km/h · A4 40 TDI
Power-to-weight ratio8.29 kg/hp8.11 kg/hpbetter ratio · 320d xDrive G20

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
BMWHybrid320d xDrive 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 TDI320d xDrive G20
0–30 km/h2.16 s1.34 s
0–50 km/h3.61 s2.37 s
0–80 km/h5.84 s4.77 s
0–100 km/h7.79 s6.96 s
0–120 km/h10.28 s9.83 s
0–160 km/h17.57 s18.30 s
0–200 km/h30.63 s34.58 s
400 m standing start15.77 s15.08 s
1,000 m standing start28.09 s27.83 s
Top speed242 km/h232 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/hp
CharacteristicValueDetail
Power190 hpPending
Torque400 Nm
Weight1 575 kgmanufacturer kerb weight
DrivetrainTraction
Gearbox7-speed S tronic
BMW

320d xDrive G20

8,11kg/hpratio better by 0,18 kg/hp
CharacteristicValueDetail
Power190 hp4 cyl
Torque400 Nm
Weight1 540 kgmanufacturer kerb weight
DrivetrainIntegrale (AWD)
GearboxEight-speed Steptronic transmission

The start: 0 to 100 km/h

Off the line, the 320d xDrive hits 100 km/h in 6.96 s versus 7.79 s for the A4 40 TDI. At this point, the 320d xDrive leads by 0.83 s and sits roughly 24 m ahead.

From 100 km/h to 400 metres

At 200 metres, the 320d xDrive is doing 119 km/h against 122 km/h for the A4 40 TDI. The gap is 0.84 s. The gap remains stable from the start.

At 400 metres standing start, the 320d xDrive crosses the line in 15.08 s versus 15.77 s. The 0.69 s gap represents roughly 29 m of track - two to three car lengths.

Beyond 400 metres: top speed comes into play

Past 400 metres, the gap narrows. The 320d xDrive maxes out at 232 km/h while the A4 40 TDI keeps accelerating towards 242 km/h. At 600 metres, the gap is down to 0.54 s from 0.69 s at 400 metres.

At 1,000 metres, the 320d xDrive finishes in 27.82 s versus 28.08 s, with just 0.26 s to spare. The A4 40 TDI fails to fully close the launch gap.

What the numbers don’t tell you

The 320d xDrive features all-wheel drive (AWD) against the A4 40 TDI’s FWD. At low speeds (0-30, 0-50, 0-80 km/h), AWD doubles the driven contact area: all four wheels transmit torque to the road, virtually eliminating wheelspin at launch. This traction advantage is decisive in the range where the motor delivers peak torque, before power and aerodynamics take over.

Electronically capped at 233 km/h, the 320d xDrive 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 8.11 kg/hp) and transmission (Automatic vs Automatic).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 11.76 seconds. The 0.83 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 320d xDrive G20
BMW 320dBMW 318d SteptronicBMW 320d xDrive

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Frequently asked questions

Over 0–100 km/h, 320d xDrive G20 wins (6,96 s vs 7,79 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. 320d xDrive G20: 190 hp, ratio 8,11 kg/hp.

A4 40 TDI: 242 km/h. 320d xDrive G20: 232 km/h.