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AX7PetrolvsBX4Diesel
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  • SpecsX7 · X4

BMW X7 M50i G07 vs BMW X4 M40d G02: 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.

luxury SUV · 2021 vs 2018 · Methodology
BMWPetrolFaster

X7 M50i G07

530 hp · 750 Nm · 2,490 kg · 2021

VS
BMWDiesel

X4 M40d G02

326 hp · 680 Nm · 1,895 kg · 2018

Result · 0–100 km/h

ABMW X7 M50i G07

4.74 s

Gap0.21 sin favour of X7 M50i
BBMW X4 M40d G02

4.94 s

Summary · Caralogy simulation
MeasureX7 M50i G07X4 M40d G02Gap
0–100 km/h4.74 s4.94 s0.21 s · X7 M50i G07
400 m standing start12.93 s13.29 s0.36 s · X7 M50i G07
1,000 m standing start23.38 s24.39 s1.01 s · X7 M50i G07
Top speed (electronically limited)250 km/h250 km/hSame
Power-to-weight ratio4.70 kg/hp5.81 kg/hpbetter ratio · X7 M50i G07

Watch the race

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

BMWPetrolX7 M50i G07
Speed
0km/h
Timer
0,00s
Distance
0m
BMWDieselX4 M40d G02
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.
StageX7 M50i G07X4 M40d G02
0–30 km/h1.31 s1.25 s · tight gap
0–50 km/h2.15 s2.02 s · tight gap
0–80 km/h3.56 s3.53 s · tight gap
0–100 km/h4.74 s4.94 s
0–120 km/h6.21 s6.72 s
0–160 km/h10.27 s11.71 s
0–200 km/h16.52 s19.89 s
400 m standing start12.93 s13.29 s
1,000 m standing start23.38 s24.39 s
Top speed limited250 km/h250 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

X7 M50i G07

4,70kg/hpratio better by 1,11 kg/hp
CharacteristicValueDetail
Power530 hp8 cyl
Torque750 Nm
Weight2 490 kgmanufacturer kerb weight
DrivetrainIntegrale (AWD)
GearboxEight-speed Steptronic transmission
BMW

X4 M40d G02

5,81kg/hpcompensated by −595 kg
CharacteristicValueDetail
Power326 hp6 cyl
Torque680 Nm
Weight1 895 kgmanufacturer kerb weight
DrivetrainIntegrale (AWD)
Gearbox8-speed Steptronic

The start: 0 to 100 km/h

Off the line, the X7 M50i hits 100 km/h in 4.74 s versus 4.94 s for the X4 M40d. Despite the faster sprint time, the X4 M40d is 1 m further along the track at this moment: stronger low-speed acceleration offsets a slower run beyond 100 km/h.

From 100 km/h to 400 metres

At 200 metres, the X7 M50i is doing 144 km/h against 137 km/h for the X4 M40d. The gap is 0.12 s. The gap remains stable from the start.

At 400 metres standing start, the X7 M50i crosses the line in 12.92 s versus 13.29 s. The 0.36 s gap represents roughly 17 m of track - two to three car lengths.

Beyond 400 metres: top speed comes into play

Past 400 metres, the X7 M50i continues to build its lead. At 600 metres, it runs at 201 km/h versus 190 km/h. At 1,000 metres, the X7 M50i finishes in 23.38 s versus 24.38 s, with a 1.00 s lead. Both vehicles have similar top speeds (250 (i.e. 155 mph - industry threshold) vs 250 (i.e. 155 mph - industry threshold) km/h), preventing any comeback.

What the numbers don’t tell you

Both rivals share the same electronic speed cap: the X7 M50i and the X4 M40d are governed to 250 (i.e. 155 mph - industry threshold) km/h. At that speed, standard-fit tyres approach their safety threshold - an industrial ceiling common to most electric vehicles in this segment. Neither car shows its true aerodynamic potential in this duel.

With two combustion powertrains, the difference comes down to power-to-weight ratio (4.70 kg/hp vs 5.81 kg/hp) and transmission (Automatic vs Automatic).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 7.77 seconds. The 0.21 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, X7 M50i G07 wins (4,74 s vs 4,94 s).

X7 M50i G07 goes from 0 to 100 km/h in 4,74 seconds (calibrated simulation).

X7 M50i G07: 530 hp, ratio 4,70 kg/hp. X4 M40d G02: 326 hp, ratio 5,81 kg/hp.

X7 M50i G07: 250 km/h. X4 M40d G02: 250 km/h.