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A320dvsB420dDiesel
  • MotorwayMotorwayRange and charging
  • PerformancePerformance0-100, top speed
  • ConsumptionConsumptionYearly cost
  • Specs320d · 420d

BMW 320d Touring G20 vs BMW 420d F32: 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 · 2019 vs 2020 · Methodology
BMWDiesel

320d Touring G20

190 hp · 400 Nm · 1,565 kg · 2019

VS
BMWDieselFaster

420d F32

190 hp · 400 Nm · 1,605 kg · 2020

Result · 0–100 km/h

ABMW 320d Touring G20

7.55 s

Gap0.51 sin favour of 420d
BBMW 420d F32

7.04 s

Summary · Caralogy simulation
Measure320d Touring G20420d F32Gap
0–100 km/h7.55 s7.04 s0.51 s · 420d F32
400 m standing start15.62 s15.11 s0.51 s · 420d F32
1,000 m standing start28.17 s27.78 s0.39 s · 420d F32
Top speed (electronically limited)229 km/h240 km/h11 km/h · 420d F32
Power-to-weight ratio8.24 kg/hp8.45 kg/hpbetter ratio · 320d Touring G20

Watch the race

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

BMWDiesel320d Touring G20
Speed
0km/h
Timer
0,00s
Distance
0m
BMWDiesel420d F32
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.
Stage320d Touring G20420d F32
0–30 km/h2.05 s1.37 s
0–50 km/h3.28 s2.40 s
0–80 km/h5.49 s4.80 s
0–100 km/h7.55 s7.04 s
0–120 km/h10.22 s9.85 s
0–160 km/h18.11 s · tight gap18.13 s
0–200 km/h33.26 s · tight gap33.30 s
400 m standing start15.62 s15.11 s
1,000 m standing start28.17 s27.78 s
Top speed229 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.

BMW

320d Touring G20

8,24kg/hpratio better by 0,21 kg/hp
CharacteristicValueDetail
Power190 hp4 cyl
Torque400 Nm
Weight1 565 kgmanufacturer kerb weight
Drivetrain-
GearboxSix-speed manual (Eight-speed Steptronic transmission)
BMW

420d F32

8,45kg/hp
CharacteristicValueDetail
Power190 hp4 cyl
Torque400 Nm
Weight1 605 kgmanufacturer kerb weight
Drivetrain-
GearboxEight-speed Steptronic transmission

The start: 0 to 100 km/h

Off the line, the 420d hits 100 km/h in 7.04 s versus 7.55 s for the 320d Touring. At this point, the 420d leads by 0.51 s and sits roughly 17 m ahead.

From 100 km/h to 400 metres

At 200 metres, the 420d is doing 119 km/h against 121 km/h for the 320d Touring. The gap is 0.59 s. The gap remains stable from the start.

At 400 metres standing start, the 420d crosses the line in 15.10 s versus 15.61 s. The 0.51 s gap represents roughly 21 m of track - two to three car lengths.

Beyond 400 metres: top speed comes into play

Past 400 metres, the gap narrows. The 320d Touring maxes out at 229 km/h while the 420d keeps accelerating towards 240 km/h. At 600 metres, the gap has dropped to 0.46 s.

At 1,000 metres, the 420d finishes in 27.77 s versus 28.17 s, with just 0.40 s to spare. The 320d Touring fails to fully close the launch gap.

What the numbers don’t tell you

Both rivals are electronically governed, but not at the same level: the 320d Touring is capped at 229 km/h, the 420d 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 (8.24 kg/hp vs 8.45 kg/hp) and transmission (Automatic vs Automatic).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 11.82 seconds. The 0.51 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.

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Audi A5 Avant

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Frequently asked questions

Over 0–100 km/h, 420d F32 wins (7,04 s vs 7,55 s).

320d Touring G20 goes from 0 to 100 km/h in 7,55 seconds (calibrated simulation).

320d Touring G20: 190 hp, ratio 8,24 kg/hp. 420d F32: 190 hp, ratio 8,45 kg/hp.

320d Touring G20: 229 km/h. 420d F32: 240 km/h.