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AX3vsB320iPetrol
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  • SpecsX3 · 320i

BMW X3 M40i G01 vs BMW 320i 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.

family SUV · 2021 vs 2019 · Methodology
BMWPetrolFaster

X3 M40i G01

360 hp · 500 Nm · 1,870 kg · 2021

VS
BMWPetrol

320i G20

184 hp · 300 Nm · 1,460 kg · 2019

Result · 0–100 km/h

ABMW X3 M40i G01

4.74 s

Gap2.31 sin favour of X3 M40i
BBMW 320i G20

7.05 s

Summary · Caralogy simulation
MeasureX3 M40i G01320i G20Gap
0–100 km/h4.74 s7.05 s2.31 s · X3 M40i G01
400 m standing start12.98 s15.12 s2.14 s · X3 M40i G01
1,000 m standing start23.62 s27.81 s4.19 s · X3 M40i G01
Top speed (electronically limited)250 km/h234 km/h16 km/h · X3 M40i G01
Power-to-weight ratio5.19 kg/hp7.93 kg/hpbetter ratio · X3 M40i G01

Watch the race

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

BMWPetrolX3 M40i G01
Speed
0km/h
Timer
0,00s
Distance
0m
BMWPetrol320i 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.
StageX3 M40i G01320i G20
0–30 km/h1.26 s · tight gap1.38 s
0–50 km/h2.08 s2.44 s
0–80 km/h3.49 s4.84 s
0–100 km/h4.74 s7.05 s
0–120 km/h6.30 s9.85 s
0–160 km/h10.59 s18.13 s
0–200 km/h17.32 s33.99 s
400 m standing start12.98 s15.12 s
1,000 m standing start23.62 s27.81 s
Top speed limited250 km/h234 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

X3 M40i G01

5,19kg/hpratio better by 2,74 kg/hp
CharacteristicValueDetail
Power360 hp6 cyl
Torque500 Nm
Weight1 870 kgmanufacturer kerb weight
DrivetrainIntegrale (AWD)
Gearbox8-speed Steptronic
BMW

320i G20

7,93kg/hpcompensated by −410 kg
CharacteristicValueDetail
Power184 hpPending
Torque300 Nm
Weight1 460 kgmanufacturer kerb weight
Drivetrain-
GearboxEight-speed Steptronic transmission

The start: 0 to 100 km/h

Off the line, the X3 M40i hits 100 km/h in 4.74 s versus 7.05 s for the 320i. At this point, the X3 M40i leads by 2.31 s and sits roughly 12 m ahead.

From 100 km/h to 400 metres

At 200 metres, the X3 M40i is doing 142 km/h against 119 km/h for the 320i. The gap is 1.26 s. The challenger starts to claw back ground.

At 400 metres standing start, the X3 M40i crosses the line in 12.98 s versus 15.11 s. The 2.13 s gap represents roughly 85 m of track - a gap visible to the naked eye.

Beyond 400 metres: top speed comes into play

Past 400 metres, the X3 M40i continues to build its lead. At 600 metres, it runs at 198 km/h versus 166 km/h. At 1,000 metres, the X3 M40i finishes in 23.62 s versus 27.81 s, with a 4.19 s lead.

What the numbers don’t tell you

Both rivals are electronically governed, but not at the same level: the X3 M40i is capped at 250 (i.e. 155 mph - industry threshold) km/h, the 320i at 235 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 (5.19 kg/hp vs 7.93 kg/hp) and transmission (Automatic vs Automatic).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 11.54 seconds. The 2.31 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.

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Frequently asked questions

Over 0–100 km/h, X3 M40i G01 wins (4,74 s vs 7,05 s).

X3 M40i G01 goes from 0 to 100 km/h in 4,74 seconds (calibrated simulation).

X3 M40i G01: 360 hp, ratio 5,19 kg/hp. 320i G20: 184 hp, ratio 7,93 kg/hp.

X3 M40i G01: 250 km/h. 320i G20: 234 km/h.