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Home›Duel›BMW X3 vs BMW 320d

Performance comparison

BMW X3 M40i G01 vs BMW 320d 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.

BMWPetrolFaster

X3 M40i G01

360 hp · 500 Nm · 1,845 kg · 2020

VS
BMWDiesel

320d G20

190 hp · 400 Nm · 1,450 kg · 2019

MotorwayRange & chargingPerformance0-100, top speedConsumptionAnnual TCO

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.

X3 M40i G01320d G20
0–100 km/h4,78 s−2,25 s7,03 s
400 m standing start13,02 s−2,11 s15,13 s
1,000 m standing start23,68 s−3,56 s27,24 s
Top speed (electronically limited)250 km/h+10 km/h240 km/h
Power-to-weight ratio5,13 kg/hpbetter ratio7,63 kg/hp

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
BMWDiesel320d 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. Winner in green.

PalierX3 M40i G01320d G20
0–30 km/h1,28 s1,81 s
0–50 km/h2,12 s3,00 s
0–80 km/h3,53 s5,11 s
0–100 km/h4,78 s7,03 s
0–120 km/h6,35 s9,49 s
0–160 km/h10,65 s16,32 s
0–200 km/h17,43 s28,13 s
400 m standing start13,02 s15,13 s
1,000 m standing start23,68 s27,24 s
Top speed limited250 km/h240 km/h

Under the bonnet

Manufacturer technical specifications. The power-to-weight ratio is the key physical factor in a drag race.

BMW

X3 M40i G01

5,13kg/hpratio better by 2,51 kg/hp
CharacteristicValueDetail
Power360 hp6 cyl
Torque500 Nm
Weight1 845 kgmanufacturer kerb weight
DrivetrainIntegrale (AWD)
Gearbox8-speed Steptronic
BMW

320d G20

7,63kg/hpcompensated by −395 kg
CharacteristicValueDetail
Power190 hpPending
Torque400 Nm
Weight1 450 kgmanufacturer kerb weight
Drivetrain-
GearboxSix-speed manual

The start: 0 to 100 km/h

Off the line, the Bmw X3 M40i hits 100 km/h in 4.78 s versus 7.03 s for the Bmw 320d. At this point, the Bmw X3 M40i leads by 2.25 s and sits roughly 20 m ahead.

From 100 km/h to 400 metres

At 200 metres, the Bmw X3 M40i is doing 142 km/h against 123 km/h for the Bmw 320d. The gap is 1.44 s. The challenger starts to claw back ground.

At 400 metres standing start, the Bmw X3 M40i crosses the line in 13.02 s versus 15.13 s. The 2.11 s gap represents roughly 87 m of track - a gap visible to the naked eye.

Beyond 400 metres: top speed comes into play

Past 400 metres, the Bmw X3 M40i continues to build its lead. At 600 metres, it runs at 197 km/h versus 173 km/h. At 1,000 metres, the Bmw X3 M40i finishes in 23.67 s versus 27.23 s, with a 3.56 s lead. Both vehicles have similar top speeds (250 (i.e. 155 mph - industry threshold) vs 240 km/h), preventing any comeback.

What the numbers don’t tell you

Both rivals are electronically governed, but not at the same level: the Bmw X3 M40i is capped at 250 (i.e. 155 mph - industry threshold) km/h, the Bmw 320d 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 (5.13 kg/hp vs 7.63 kg/hp) and transmission (Automatic vs Manual).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 10.96 seconds. The 2.25 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 X3 M40i G01
Audi SQ5 SUVAlfa Romeo Stelvio VeloceAudi SQ5 Sportback
Instead of 320d G20
MINI John Cooper Works FWDAudi A5 SedanMINI Cooper S FWD

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Frequently asked questions

Over 0–100 km/h, X3 M40i G01 wins (4,78 s vs 7,03 s).

X3 M40i G01 goes from 0 to 100 km/h in 4,78 seconds (calibrated simulation).

X3 M40i G01: 360 hp, ratio 5,13 kg/hp. 320d G20: 190 hp, ratio 7,63 kg/hp.

X3 M40i G01: 250 km/h. 320d G20: 240 km/h.