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AQ8PHEVvsBX4Diesel
  • MotorwayMotorwayRange and charging
  • PerformancePerformance0-100, top speed
  • ConsumptionConsumptionYearly cost
  • SpecsQ8 · X4

Audi Q8 SUV 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.

large SUV · 2025 vs 2021 · Methodology
AudiPHEV

Q8 SUV

489 hp · 700 Nm · 2,415 kg · 2025

VS
BMWDieselFaster

X4 M40d G02

340 hp · 700 Nm · 2,020 kg · 2021

Result · 0–100 km/h

AAudi Q8 SUV

4.93 s

Gap0.12 sin favour of X4 M40d
BBMW X4 M40d G02

4.81 s

Summary · Caralogy simulation
MeasureQ8 SUVX4 M40d G02Gap
0–100 km/h4.93 s4.81 s0.12 s · X4 M40d G02
400 m standing start13.19 s13.13 s0.06 s · X4 M40d G02
1,000 m standing start23.97 s24.04 s0.07 s · Q8 SUV
Top speed (electronically limited)240 km/h250 km/h10 km/h · X4 M40d G02
Power-to-weight ratio4.94 kg/hp5.94 kg/hpbetter ratio · Q8 SUV

Watch the race

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

AudiPHEVQ8 SUV
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.
StageQ8 SUVX4 M40d G02
0–30 km/h1.29 s1.18 s · tight gap
0–50 km/h2.14 s1.93 s
0–80 km/h3.60 s3.44 s
0–100 km/h4.93 s4.81 s · tight gap
0–120 km/h6.58 s6.53 s · tight gap
0–160 km/h11.10 s11.29 s
0–200 km/h18.18 s18.75 s
400 m standing start13.19 s13.13 s · tight gap
1,000 m standing start23.97 s · tight gap24.04 s
Top speed limited240 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.

Audi

Q8 SUV

4,94kg/hpratio better by 1,00 kg/hp
CharacteristicValueDetail
Power489 hpPending
Torque700 Nm
Weight2 415 kgmanufacturer kerb weight
DrivetrainIntegrale (AWD)
Gearbox8-speed tiptronic
BMW

X4 M40d G02

5,94kg/hpcompensated by −395 kg
CharacteristicValueDetail
Power340 hp6 cyl
Torque700 Nm
Weight2 020 kgmanufacturer kerb weight
Drivetrain-
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 4.93 s for the Q8 SUV. Despite lacking instant torque, 340 hp of power compensates. At this point, the X4 M40d leads by 0.12 s and sits roughly 4 m ahead.

From 100 km/h to 400 metres

At 200 metres, the X4 M40d is doing 139 km/h against 140 km/h for the Q8 SUV. The gap is 0.11 s. The gap remains stable from the start.

At 400 metres standing start, the X4 M40d crosses the line in 13.13 s versus 13.18 s. The 0.06 s gap represents roughly 3 m of track - barely a car length.

Beyond 400 metres: top speed comes into play

Past 400 metres, the situation changes. The Q8 SUV maxes out at 240 km/h while the X4 M40d keeps accelerating towards 250 (i.e. 155 mph - industry threshold) km/h. At 600 metres, the gap has dropped to 0.01 s.

Around 634 metres, both vehicles are level. This is the inversion point: the Q8 SUV overcomes its launch deficit thanks to a 10 km/h higher top speed.

At 1,000 metres, the Q8 SUV finishes in 23.96 s versus 24.04 s. The 0.07 s delta shows an extremely tight race.

What the numbers don’t tell you

Both rivals are electronically governed, but not at the same level: the Q8 SUV is capped at 240 km/h, the X4 M40d at 250 (i.e. 155 mph - industry threshold) 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.

Instant electric torque gives an advantage off the line. The higher top speed of the combustion engine gives an advantage over longer distances. The distance at which one catches the other depends on the top speed differential.

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 7.54 seconds. The 0.12 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 4,93 s).

Q8 SUV goes from 0 to 100 km/h in 4,93 seconds (calibrated simulation).

Q8 SUV: 489 hp, ratio 4,94 kg/hp. X4 M40d G02: 340 hp, ratio 5,94 kg/hp.

Q8 SUV: 240 km/h. X4 M40d G02: 250 km/h.