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Home›Duel›Porsche 718 vs BMW Z4

Performance comparison

Porsche 718 Cayman GTS 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.

PorschePetrolFaster

718 Cayman GTS

365 hp · 420 Nm · 1,375 kg · 2018

VS
BMWPetrol

Z4 M40i G29

340 hp · 500 Nm · 1,555 kg · 2021

MotorwayRange & chargingPerformance0-100, top speedConsumptionAnnual TCO

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.

718 Cayman GTSZ4 M40i G29
0–100 km/h4,46 s−0,08 s4,54 s
400 m standing start12,32 s−0,40 s12,72 s
1,000 m standing start21,97 s−1,03 s23,00 s
Top speed (electronically limited)290 km/h+40 km/h250 km/h
Power-to-weight ratio3,77 kg/hpbetter ratio4,57 kg/hp

Watch the race

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

PorschePetrol718 Cayman GTS
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. Winner in green.

Palier718 Cayman GTSZ4 M40i G29
0–30 km/h1,21 s1,26 stight gap
0–50 km/h2,02 s2,11 stight gap
0–80 km/h3,52 s3,41 stight gap
0–100 km/h4,46 s4,54 stight gap
0–120 km/h5,50 s5,97 s
0–160 km/h8,63 s9,81 s
0–200 km/h13,06 s15,62 s
400 m standing start12,32 s12,72 s
1,000 m standing start21,97 s23,00 s
Top speed limited290 km/h250 km/h

Under the bonnet

Manufacturer technical specifications. The power-to-weight ratio is the key physical factor in a drag race.

Porsche

718 Cayman GTS

3,77kg/hpratio better by 0,81 kg/hp
CharacteristicValueDetail
Power365 hpB4
Torque420 Nm
Weight1 375 kgmanufacturer kerb weight
DrivetrainPropulsion
GearboxMANUAL
BMW

Z4 M40i G29

4,57kg/hpcompensated by −180 kg
CharacteristicValueDetail
Power340 hp6 cyl
Torque500 Nm
Weight1 555 kgmanufacturer kerb weight
DrivetrainZ4 M40i
GearboxEight-speed Steptronic transmission

The start: 0 to 100 km/h

Off the line, the 718 Cayman GTS hits 100 km/h in 4.47 s versus 4.55 s for the Bmw Z4 M40i. The 0.08 s gap is negligible: both vehicles are neck and neck.

From 100 km/h to 400 metres

At 200 metres, the 718 Cayman GTS is doing 155 km/h against 147 km/h for the Bmw Z4 M40i. The gap is 0.16 s. The gap widens compared to the 0-100.

At 400 metres standing start, the 718 Cayman GTS crosses the line in 12.32 s versus 12.71 s. The 0.40 s gap represents roughly 20 m of track — two to three car lengths.

Beyond 400 metres: top speed comes into play

Past 400 metres, the 718 Cayman GTS continues to build its lead. At 600 metres, it runs at 217 km/h versus 204 km/h. At 1,000 metres, the 718 Cayman GTS finishes in 21.96 s versus 23.00 s, with a 1.04 s lead.

What the numbers don’t tell you

Both rivals are electronically governed, but not at the same level: the 718 Cayman GTS is capped at 290 km/h, the Bmw 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 (3.77 kg/hp vs 4.57 kg/hp) and transmission (Manual vs Automatic).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 6.79 seconds. The 0.08 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 718 Cayman GTS
BMW M2Ford Mustang GT S550 450Alpine A110 GT 300
Instead of Z4 M40i G29
Porsche 911 Carrera 4S CabrioletPorsche 911 Carrera S CabrioletPorsche 911 Carrera Cabriolet

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Frequently asked questions

Sur 0–100 km/h, 718 Cayman GTS gagne (4,46 s vs 4,54 s).

718 Cayman GTS passe de 0 à 100 km/h en 4,46 secondes (simulation calibrée).

718 Cayman GTS : 365 hp, ratio 3,77 kg/hp. Z4 M40i G29 : 340 hp, ratio 4,57 kg/hp.

718 Cayman GTS : 290 km/h. Z4 M40i G29 : 250 km/h.