Skip to main content
CaralogyCaralogy
HomeBrandsRoad TripBudgetDuelGuides
Caralogy

The car comparison platform. Physics simulation, road trips, real costs.

Navigation
All brandsCar duelRunning costsMotorwayMethodology
Simulators
Motorway simulatorRunning costsPerformance duel
Brands
VolkswagenBMWMercedesToyotaTeslaAudi
FRENDEESIT
© 2026 Caralogy · All rights reserved
  1. Home
  2. /Duel
  3. /Estates
A911vsBZ4Petrol
  • MotorwayMotorwayRange and charging
  • PerformancePerformance0-100, top speed
  • ConsumptionConsumptionYearly cost
  • Specs911 · Z4

Porsche 911 Turbo 991.1 vs BMW Z4 M40i G29: 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 · 2015 vs 2018 · Methodology
PorschePetrolFaster

911 Turbo 991.1

520 hp · 660 Nm · 1,595 kg · 2015

VS
BMWPetrol

Z4 M40i G29

340 hp · 500 Nm · 1,535 kg · 2018

Result · 0–100 km/h

APorsche 911 Turbo 991.1

3.22 s

Gap1.32 sin favour of 911 Turbo
BBMW Z4 M40i G29

4.54 s

Summary · Caralogy simulation
Measure911 Turbo 991.1Z4 M40i G29Gap
0–100 km/h3.22 s4.54 s1.32 s · 911 Turbo 991.1
400 m standing start10.97 s12.70 s1.73 s · 911 Turbo 991.1
1,000 m standing start19.90 s22.95 s3.05 s · 911 Turbo 991.1
Top speed (electronically limited)314 km/h250 km/h64 km/h · 911 Turbo 991.1
Power-to-weight ratio3.07 kg/hp4.51 kg/hpbetter ratio · 911 Turbo 991.1

Watch the race

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

PorschePetrol911 Turbo 991.1
Speed
0km/h
Timer
0,00s
Distance
0m
BMWPetrolZ4 M40i G29
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 Turbo 991.1Z4 M40i G29
0–30 km/h0.92 s1.27 s
0–50 km/h1.54 s2.12 s
0–80 km/h2.51 s3.42 s
0–100 km/h3.22 s4.54 s
0–120 km/h4.13 s5.95 s
0–160 km/h6.46 s9.74 s
0–200 km/h9.81 s15.46 s
400 m standing start10.97 s12.70 s
1,000 m standing start19.90 s22.95 s
Top speed limited314 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 Turbo 991.1

3,07kg/hpratio better by 1,45 kg/hp
CharacteristicValueDetail
Power520 hpB6
Torque660 Nm
Weight1 595 kgmanufacturer kerb weight
DrivetrainIntegrale (AWD)
GearboxDUAL_CLUTCH
BMW

Z4 M40i G29

4,51kg/hpcompensated by −60 kg
CharacteristicValueDetail
Power340 hp6 cyl
Torque500 Nm
Weight1 535 kgmanufacturer kerb weight
Drivetrain-
GearboxEight-speed Steptronic transmission

The start: 0 to 100 km/h

Off the line, the 911 Turbo hits 100 km/h in 3.22 s versus 4.54 s for the Z4 M40i. At this point, the 911 Turbo leads by 1.32 s and sits roughly 12 m ahead.

From 100 km/h to 400 metres

At 200 metres, the 911 Turbo is doing 170 km/h against 147 km/h for the Z4 M40i. The gap is 1.15 s. The challenger starts to claw back ground.

At 400 metres standing start, the 911 Turbo crosses the line in 10.97 s versus 12.70 s. The 1.73 s gap represents roughly 85 m of track - a gap visible to the naked eye.

Beyond 400 metres: top speed comes into play

Past 400 metres, the 911 Turbo continues to build its lead. At 600 metres, it runs at 235 km/h versus 205 km/h. At 1,000 metres, the 911 Turbo finishes in 19.89 s versus 22.95 s, with a 3.05 s lead.

What the numbers don’t tell you

Both rivals are electronically governed, but not at the same level: the 911 Turbo is capped at 314 km/h, the Z4 M40i 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 (3.07 kg/hp vs 4.51 kg/hp) and transmission (Automatic vs Automatic).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 6.76 seconds. The 1.32 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.

Compare with other alternatives

Swap one of the two models to explore an equivalent duel in the same segment.

Instead of 911 Turbo 991.1
Porsche 911 Carrera 4Porsche 911 Carrera 4 GTSPorsche 911 Carrera S

Other duels you might be interested in

JaguarVSPorsche

F-TYPE R P575 vs 911 Turbo

PorscheVSBMW

911 Carrera T vs Z4 M40i

LamborghiniVSPorsche

Huracán EVO RWD vs 911 Turbo

PorscheVSBMW

911 Carrera T PDK vs Z4 M40i

Frequently asked questions

Over 0–100 km/h, 911 Turbo 991.1 wins (3,22 s vs 4,54 s).

911 Turbo 991.1 goes from 0 to 100 km/h in 3,22 seconds (calibrated simulation).

911 Turbo 991.1: 520 hp, ratio 3,07 kg/hp. Z4 M40i G29: 340 hp, ratio 4,51 kg/hp.

911 Turbo 991.1: 314 km/h. Z4 M40i G29: 250 km/h.