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A420dDieselvsB420iPetrol
  • MotorwayMotorwayRange and charging
  • PerformancePerformance0-100, top speed
  • ConsumptionConsumptionYearly cost
  • Specs420d · 420i

BMW 420d F32 vs BMW 420i xDrive Gran Coupe G22: 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
BMWDieselFaster

420d F32

190 hp · 400 Nm · 1,605 kg · 2020

VS
BMWPetrol

420i xDrive Gran Coupe G22

184 hp · 270 Nm · 1,630 kg · 2021

Result · 0–100 km/h

ABMW 420d F32

7.04 s

Gap0.92 sin favour of 420d
BBMW 420i xDrive Gran Coupe G22

7.96 s

Summary · Caralogy simulation
Measure420d F32420i xDrive Gran Coupe G22Gap
0–100 km/h7.04 s7.96 s0.92 s · 420d F32
400 m standing start15.11 s15.81 s0.70 s · 420d F32
1,000 m standing start27.78 s28.83 s1.05 s · 420d F32
Top speed (electronically limited)240 km/h231 km/h9 km/h · 420d F32
Power-to-weight ratio8.45 kg/hp8.86 kg/hpbetter ratio · 420d F32

Watch the race

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

BMWDiesel420d F32
Speed
0km/h
Timer
0,00s
Distance
0m
BMWPetrol420i xDrive Gran Coupe G22
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.
Stage420d F32420i xDrive Gran Coupe G22
0–30 km/h1.37 s1.71 s
0–50 km/h2.40 s2.90 s
0–80 km/h4.80 s5.51 s
0–100 km/h7.04 s7.96 s
0–120 km/h9.85 s11.01 s
0–160 km/h18.13 s20.08 s
0–200 km/h33.30 s37.77 s
400 m standing start15.11 s15.81 s
1,000 m standing start27.78 s28.83 s
Top speed240 km/h231 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

420d F32

8,45kg/hpratio better by 0,41 kg/hp
CharacteristicValueDetail
Power190 hp4 cyl
Torque400 Nm
Weight1 605 kgmanufacturer kerb weight
Drivetrain-
GearboxEight-speed Steptronic transmission
BMW

420i xDrive Gran Coupe G22

8,86kg/hp
CharacteristicValueDetail
Power184 hp4 cyl
Torque270 Nm
Weight1 630 kgmanufacturer kerb weight
DrivetrainIntegrale (AWD)
Gearbox8-speed Steptronic

The start: 0 to 100 km/h

Off the line, the 420d hits 100 km/h in 7.04 s versus 7.96 s for the 420i xDrive Gran Coupe. At this point, the 420d leads by 0.92 s and sits roughly 13 m ahead.

From 100 km/h to 400 metres

At 200 metres, the 420d is doing 119 km/h against 116 km/h for the 420i xDrive Gran Coupe. The gap is 0.56 s. The challenger starts to claw back ground.

At 400 metres standing start, the 420d crosses the line in 15.10 s versus 15.81 s. The 0.71 s gap represents roughly 28 m of track - two to three car lengths.

Beyond 400 metres: top speed comes into play

Past 400 metres, the 420d continues to build its lead. At 600 metres, it runs at 166 km/h versus 161 km/h. At 1,000 metres, the 420d finishes in 27.77 s versus 28.82 s, with a 1.05 s lead. Both vehicles have similar top speeds (240 vs 231 km/h), preventing any comeback.

What the numbers don’t tell you

Both rivals are electronically governed, but not at the same level: the 420d is capped at 240 km/h, the 420i xDrive Gran Coupe at 231 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 (8.45 kg/hp vs 8.86 kg/hp) and transmission (Automatic vs Automatic).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 12.86 seconds. The 0.92 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.

Other duels you might be interested in

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A5 Avant vs 420i xDrive Gran Coupe

Frequently asked questions

Over 0–100 km/h, 420d F32 wins (7,04 s vs 7,96 s).

420d F32 goes from 0 to 100 km/h in 7,04 seconds (calibrated simulation).

420d F32: 190 hp, ratio 8,45 kg/hp. 420i xDrive Gran Coupe G22: 184 hp, ratio 8,86 kg/hp.

420d F32: 240 km/h. 420i xDrive Gran Coupe G22: 231 km/h.