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AX4DieselvsB225iPetrol
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BMW X4 M40d G02 vs BMW 225i xDrive Active Tourer F44: 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 2020 · Methodology
BMWDieselFaster

X4 M40d G02

340 hp · 700 Nm · 2,020 kg · 2021

VS
BMWPetrol

225i xDrive Active Tourer F44

231 hp · 350 Nm · 1,520 kg · 2020

Result · 0–100 km/h

ABMW X4 M40d G02

4.81 s

Gap1.82 sin favour of X4 M40d
BBMW 225i xDrive Active Tourer F44

6.63 s

Summary · Caralogy simulation
MeasureX4 M40d G02225i xDrive Active Tourer F44Gap
0–100 km/h4.81 s6.63 s1.82 s · X4 M40d G02
400 m standing start13.13 s14.83 s1.70 s · X4 M40d G02
1,000 m standing start24.04 s26.93 s2.89 s · X4 M40d G02
Top speed (electronically limited)250 km/h234 km/h16 km/h · X4 M40d G02
Power-to-weight ratio5.94 kg/hp6.58 kg/hpbetter ratio · X4 M40d G02

Watch the race

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

BMWDieselX4 M40d G02
Speed
0km/h
Timer
0,00s
Distance
0m
BMWPetrol225i xDrive Active Tourer F44
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.
StageX4 M40d G02225i xDrive Active Tourer F44
0–30 km/h1.18 s1.73 s
0–50 km/h1.93 s2.83 s
0–80 km/h3.44 s4.83 s
0–100 km/h4.81 s6.63 s
0–120 km/h6.53 s8.96 s
0–160 km/h11.29 s15.73 s
0–200 km/h18.75 s28.72 s
400 m standing start13.13 s14.83 s
1,000 m standing start24.04 s26.93 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

X4 M40d G02

5,94kg/hpratio better by 0,64 kg/hp
CharacteristicValueDetail
Power340 hp6 cyl
Torque700 Nm
Weight2 020 kgmanufacturer kerb weight
Drivetrain-
Gearbox8-speed Steptronic
BMW

225i xDrive Active Tourer F44

6,58kg/hpcompensated by −500 kg
CharacteristicValueDetail
Power231 hp4 cyl
Torque350 Nm
Weight1 520 kgmanufacturer kerb weight
DrivetrainIntegrale (AWD)
Gearbox8-speed Steptronic

The start: 0 to 100 km/h

Off the line, the X4 M40d hits 100 km/h in 4.81 s versus 6.63 s for the 225i xDrive Active Tourer. At this point, the X4 M40d leads by 1.82 s and sits roughly 20 m ahead.

From 100 km/h to 400 metres

At 200 metres, the X4 M40d is doing 139 km/h against 126 km/h for the 225i xDrive Active Tourer. The gap is 1.23 s. The challenger starts to claw back ground.

At 400 metres standing start, the X4 M40d crosses the line in 13.13 s versus 14.83 s. The 1.70 s gap represents roughly 72 m of track - a gap visible to the naked eye.

Beyond 400 metres: top speed comes into play

Past 400 metres, the X4 M40d continues to build its lead. At 600 metres, it runs at 193 km/h versus 174 km/h. At 1,000 metres, the X4 M40d finishes in 24.04 s versus 26.93 s, with a 2.89 s lead.

What the numbers don’t tell you

Both rivals are electronically governed, but not at the same level: the X4 M40d is capped at 250 (i.e. 155 mph - industry threshold) km/h, the 225i xDrive Active Tourer 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 (5.94 kg/hp vs 6.58 kg/hp) and transmission (Automatic vs Automatic).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 10.33 seconds. The 1.82 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, X4 M40d G02 wins (4,81 s vs 6,63 s).

X4 M40d G02 goes from 0 to 100 km/h in 4,81 seconds (calibrated simulation).

X4 M40d G02: 340 hp, ratio 5,94 kg/hp. 225i xDrive Active Tourer F44: 231 hp, ratio 6,58 kg/hp.

X4 M40d G02: 250 km/h. 225i xDrive Active Tourer F44: 234 km/h.