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AP7BEVvsB718Petrol
  • MotorwayMotorwayRange and charging
  • PerformancePerformance0-100, top speed
  • ConsumptionConsumptionYearly cost
  • SpecsP7 · 718

Xpeng P7 vs Porsche 718 Cayman: 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.

saloon · 2020 vs 2018 · Methodology
XpengBEVFaster

P7

424 hp · 655 Nm · 2,040 kg · 2020

VS
PorschePetrol

718 Cayman

300 hp · 380 Nm · 1,335 kg · 2018

Result · 0–100 km/h

AXpeng P7

4.21 s

Gap0.34 sin favour of P7
BPorsche 718 Cayman

4.56 s

Summary · Caralogy simulation
MeasureP7718 CaymanGap
0–100 km/h4.21 s4.56 s0.34 s · P7
400 m standing start12.55 s12.66 s0.11 s · P7
1,000 m standing start25.25 s22.89 s2.36 s · 718 Cayman
Top speed (electronically limited)170 km/h274 km/h104 km/h · 718 Cayman
Power-to-weight ratio4.81 kg/hp4.45 kg/hpbetter ratio · 718 Cayman

Watch the race

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

XpengBEVP7
Speed
0km/h
Timer
0,00s
Distance
0m
PorschePetrol718 Cayman
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.
StageP7718 Cayman
0–30 km/h1.11 s1.28 s
0–50 km/h1.85 s2.13 s
0–80 km/h3.09 s3.50 s
0–100 km/h4.21 s4.56 s
0–120 km/h5.64 s5.89 s
0–160 km/h9.67 s9.50 s
0–200 km/h-15.19 s
400 m standing start12.55 s · tight gap12.66 s
1,000 m standing start25.25 s22.89 s
Top speed170 km/h274 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.

Xpeng

P7

4,81kg/hpcompensated by −705 kg
CharacteristicValueDetail
Power424 hpDual Permanent Magnet Synchronous Motor
Torque655 Nm
Weight2 040 kgmanufacturer kerb weight
DrivetrainIntegrale (AWD)
GearboxSingle-speed fixed gear
Porsche

718 Cayman

4,45kg/hpratio better by 0,36 kg/hp
CharacteristicValueDetail
Power300 hpB4
Torque380 Nm
Weight1 335 kgmanufacturer kerb weight
DrivetrainPropulsion
GearboxDUAL_CLUTCH

The start: 0 to 100 km/h

Off the line, the P7 hits 100 km/h in 4.22 s versus 4.56 s for the 718 Cayman. The instant torque of 655 Nm from the electric motor makes the difference. At this point, the P7 leads by 0.34 s and sits roughly 7 m ahead.

From 100 km/h to 400 metres

At 200 metres, the P7 is doing 147 km/h against 149 km/h for the 718 Cayman. The gap is 0.24 s. The challenger starts to claw back ground.

At 400 metres standing start, the P7 crosses the line in 12.54 s versus 12.65 s. The 0.11 s gap represents roughly 6 m of track - barely a car length.

Beyond 400 metres: top speed comes into play

Past 400 metres, the situation changes. The P7 maxes out at 170 km/h while the 718 Cayman keeps accelerating towards 274 km/h. At 600 metres, the gap has dropped to 0.45 s.

Around 454 metres, both vehicles are level. This is the inversion point: the 718 Cayman overcomes its launch deficit thanks to a 104 km/h higher top speed.

At 1,000 metres, the 718 Cayman finishes in 22.89 s versus 25.24 s. The 2.36 s delta in favour of the 718 Cayman shows that top speed makes a clear difference.

What the numbers don’t tell you

The P7 features all-wheel drive (AWD) against the 718 Cayman’s RWD. At low speeds (0-30, 0-50, 0-80 km/h), AWD doubles the driven contact area: all four wheels transmit torque to the road, virtually eliminating wheelspin at launch. This traction advantage is decisive in the range where the motor delivers peak torque, before power and aerodynamics take over.

Both rivals are electronically governed, but not at the same level: the P7 is capped at 170 km/h, the 718 Cayman at 274 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 6.70 seconds. The 0.34 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, P7 wins (4,21 s vs 4,56 s).

P7 goes from 0 to 100 km/h in 4,21 seconds (calibrated simulation).

P7: 424 hp, ratio 4,81 kg/hp. 718 Cayman: 300 hp, ratio 4,45 kg/hp.

P7: 170 km/h. 718 Cayman: 274 km/h.