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Porsche 911 Carrera (Manual) 991.1 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.

sports car · 2011 vs 2021 · Methodology
PorschePetrol

911 Carrera (Manual) 991.1

350 hp · 390 Nm · 1,445 kg · 2011

VS
BMWDiesel

X4 M40d G02

340 hp · 700 Nm · 2,020 kg · 2021

Result · 0–100 km/h

APorsche 911 Carrera (Manual) 991.1

4.77 s

Gap0.04 sNot a significant gap
BBMW X4 M40d G02

4.81 s

Summary · Caralogy simulation
Measure911 Carrera (Manual) 991.1X4 M40d G02Gap
0–100 km/h4.77 s4.81 s0.04 s · 911 Carrera (Manual) 991.1
400 m standing start12.81 s13.13 s0.32 s · 911 Carrera (Manual) 991.1
1,000 m standing start22.89 s24.04 s1.15 s · 911 Carrera (Manual) 991.1
Top speed (electronically limited)289 km/h250 km/h39 km/h · 911 Carrera (Manual) 991.1
Power-to-weight ratio4.13 kg/hp5.94 kg/hpbetter ratio · 911 Carrera (Manual) 991.1

Watch the race

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

PorschePetrol911 Carrera (Manual) 991.1
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.
Stage911 Carrera (Manual) 991.1X4 M40d G02
0–30 km/h1.29 s1.18 s · tight gap
0–50 km/h2.15 s1.93 s
0–80 km/h3.75 s3.44 s
0–100 km/h4.77 s · tight gap4.81 s
0–120 km/h6.30 s6.53 s
0–160 km/h9.65 s11.29 s
0–200 km/h14.89 s18.75 s
400 m standing start12.81 s13.13 s
1,000 m standing start22.89 s24.04 s
Top speed limited289 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.

Porsche

911 Carrera (Manual) 991.1

4,13kg/hpratio better by 1,81 kg/hp
CharacteristicValueDetail
Power350 hp6 cyl
Torque390 Nm
Weight1 445 kgmanufacturer kerb weight
DrivetrainPropulsion
GearboxMANUAL
BMW

X4 M40d G02

5,94kg/hpcompensated by −575 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 911 Carrera (Manual) hits 100 km/h in 4.77 s versus 4.81 s for the X4 M40d. The 0.04 s gap is negligible: both vehicles are neck and neck.

From 100 km/h to 400 metres

At 200 metres, the 911 Carrera (Manual) is doing 148 km/h against 139 km/h for the X4 M40d. The gap is 0.00 s. The gap remains stable from the start.

At 400 metres standing start, the 911 Carrera (Manual) crosses the line in 12.81 s versus 13.13 s. The 0.32 s gap represents roughly 15 m of track - two to three car lengths.

Beyond 400 metres: top speed comes into play

Past 400 metres, the 911 Carrera (Manual) continues to build its lead. At 600 metres, it runs at 209 km/h versus 193 km/h. At 1,000 metres, the 911 Carrera (Manual) finishes in 22.88 s versus 24.04 s, with a 1.15 s lead.

What the numbers don’t tell you

Both rivals are electronically governed, but not at the same level: the 911 Carrera (Manual) is capped at 289 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.

With two combustion powertrains, the difference comes down to power-to-weight ratio (4.13 kg/hp vs 5.94 kg/hp) and transmission (Manual vs Automatic).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 7.54 seconds. The 0.04 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, 911 Carrera (Manual) 991.1 and X4 M40d G02 are neck and neck (4,77 s vs 4,81 s, no significant gap).

911 Carrera (Manual) 991.1 goes from 0 to 100 km/h in 4,77 seconds (calibrated simulation).

911 Carrera (Manual) 991.1: 350 hp, ratio 4,13 kg/hp. X4 M40d G02: 340 hp, ratio 5,94 kg/hp.

911 Carrera (Manual) 991.1: 289 km/h. X4 M40d G02: 250 km/h.