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AX6vsBX4Petrol
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  • SpecsX6 · X4

BMW X6 M50i G06 vs BMW X4 M40i 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.

large SUV · 2021 vs 2020 · Methodology
BMWPetrolFaster

X6 M50i G06

530 hp · 750 Nm · 2,240 kg · 2021

VS
BMWPetrol

X4 M40i G02

360 hp · 500 Nm · 1,865 kg · 2020

Result · 0–100 km/h

ABMW X6 M50i G06

4.25 s

Gap0.49 sin favour of X6 M50i
BBMW X4 M40i G02

4.75 s

Summary · Caralogy simulation
MeasureX6 M50i G06X4 M40i G02Gap
0–100 km/h4.25 s4.75 s0.49 s · X6 M50i G06
400 m standing start12.30 s12.99 s0.69 s · X6 M50i G06
1,000 m standing start22.14 s23.62 s1.48 s · X6 M50i G06
Top speed (electronically limited)250 km/h250 km/hSame
Power-to-weight ratio4.23 kg/hp5.18 kg/hpbetter ratio · X6 M50i G06

Watch the race

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

BMWPetrolX6 M50i G06
Speed
0km/h
Timer
0,00s
Distance
0m
BMWPetrolX4 M40i 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.
StageX6 M50i G06X4 M40i G02
0–30 km/h1.25 s1.25 s · tight gap
0–50 km/h2.06 s · tight gap2.08 s
0–80 km/h3.27 s3.50 s
0–100 km/h4.25 s4.75 s
0–120 km/h5.46 s6.31 s
0–160 km/h8.75 s10.60 s
0–200 km/h13.66 s17.30 s
400 m standing start12.30 s12.99 s
1,000 m standing start22.14 s23.62 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

X6 M50i G06

4,23kg/hpratio better by 0,95 kg/hp
CharacteristicValueDetail
Power530 hp8 cyl
Torque750 Nm
Weight2 240 kgmanufacturer kerb weight
DrivetrainIntegrale (AWD)
GearboxEight-speed Steptronic transmission
BMW

X4 M40i G02

5,18kg/hpcompensated by −375 kg
CharacteristicValueDetail
Power360 hp6 cyl
Torque500 Nm
Weight1 865 kgmanufacturer kerb weight
DrivetrainIntegrale (AWD)
Gearbox8-speed Steptronic

The start: 0 to 100 km/h

Off the line, the X6 M50i hits 100 km/h in 4.26 s versus 4.75 s for the X4 M40i. At this point, the X6 M50i leads by 0.49 s and sits roughly 2 m ahead.

From 100 km/h to 400 metres

At 200 metres, the X6 M50i is doing 154 km/h against 142 km/h for the X4 M40i. The gap is 0.37 s. The challenger starts to claw back ground.

At 400 metres standing start, the X6 M50i crosses the line in 12.29 s versus 12.98 s. The 0.69 s gap represents roughly 33 m of track - a gap visible to the naked eye.

Beyond 400 metres: top speed comes into play

Past 400 metres, the X6 M50i continues to build its lead. At 600 metres, it runs at 214 km/h versus 198 km/h. At 1,000 metres, the X6 M50i finishes in 22.14 s versus 23.62 s, with a 1.48 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 X6 M50i and the X4 M40i 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 (4.23 kg/hp vs 5.18 kg/hp) and transmission (Automatic vs Automatic).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 7.22 seconds. The 0.49 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, X6 M50i G06 wins (4,25 s vs 4,75 s).

X6 M50i G06 goes from 0 to 100 km/h in 4,25 seconds (calibrated simulation).

X6 M50i G06: 530 hp, ratio 4,23 kg/hp. X4 M40i G02: 360 hp, ratio 5,18 kg/hp.

X6 M50i G06: 250 km/h. X4 M40i G02: 250 km/h.