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AP7iBEVvsB120dDiesel
  • MotorwayMotorwayRange and charging
  • PerformancePerformance0-100, top speed
  • ConsumptionConsumptionYearly cost
  • SpecsP7i · 120d

Xpeng P7i vs BMW 120d F40: 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 · 2023 vs 2020 · Methodology
XpengBEVFaster

P7i

282 hp · 430 Nm · 2,025 kg · 2023

VS
BMWDiesel

120d F40

190 hp · 400 Nm · 1,450 kg · 2020

Result · 0–100 km/h

AXpeng P7i

6.31 s

Gap1.07 sin favour of P7i
BBMW 120d F40

7.38 s

Summary · Caralogy simulation
MeasureP7i120d F40Gap
0–100 km/h6.31 s7.38 s1.07 s · P7i
400 m standing start14.57 s15.41 s0.84 s · P7i
1,000 m standing start26.38 s27.90 s1.52 s · P7i
Top speed (electronically limited)200 km/h231 km/h31 km/h · 120d F40
Power-to-weight ratio7.18 kg/hp7.63 kg/hpbetter ratio · P7i

Watch the race

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

XpengBEVP7i
Speed
0km/h
Timer
0,00s
Distance
0m
BMWDiesel120d F40
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.
StageP7i120d F40
0–30 km/h1.66 s1.87 s
0–50 km/h2.77 s3.04 s
0–80 km/h4.62 s5.29 s
0–100 km/h6.31 s7.38 s
0–120 km/h8.47 s9.97 s
0–160 km/h14.90 s17.66 s
0–200 km/h25.20 s32.84 s
400 m standing start14.57 s15.41 s
1,000 m standing start26.38 s27.90 s
Top speed200 km/h231 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

P7i

7,18kg/hpratio better by 0,45 kg/hp
CharacteristicValueDetail
Power282 hpPermanent Magnet Synchronous Motor
Torque430 Nm
Weight2 025 kgmanufacturer kerb weight
DrivetrainPropulsion
GearboxSingle-speed fixed gear
BMW

120d F40

7,63kg/hpcompensated by −575 kg
CharacteristicValueDetail
Power190 hpPending
Torque400 Nm
Weight1 450 kgmanufacturer kerb weight
Drivetrain-
Gearbox8-speed Steptronic transmission

The start: 0 to 100 km/h

Off the line, the P7i hits 100 km/h in 6.31 s versus 7.38 s for the 120d. The instant torque of 430 Nm from the electric motor makes the difference. At this point, the P7i leads by 1.07 s and sits roughly 9 m ahead.

From 100 km/h to 400 metres

At 200 metres, the P7i is doing 129 km/h against 121 km/h for the 120d. The gap is 0.57 s. The challenger starts to claw back ground.

At 400 metres standing start, the P7i crosses the line in 14.56 s versus 15.41 s. The 0.85 s gap represents roughly 35 m of track - a gap visible to the naked eye.

Beyond 400 metres: top speed comes into play

Past 400 metres, the P7i continues to build its lead. At 600 metres, it runs at 178 km/h versus 168 km/h. At 1,000 metres, the P7i finishes in 26.38 s versus 27.90 s, with a 1.52 s lead. Despite a higher top speed (231 km/h), the 120d never recovers its launch deficit.

What the numbers don’t tell you

Both rivals are electronically governed, but not at the same level: the P7i is capped at 200 km/h, the 120d at 231 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 11.54 seconds. The 1.07 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.

Other duels you might be interested in

TeslaVSXpeng

Model 3 RWD vs P7i

BMWVSAudi

120d vs A3 Sedan

BMWVSXpeng

i4 eDrive35 vs P7i

BMWVSAudi

120d vs A3 Sportback

Frequently asked questions

Over 0–100 km/h, P7i wins (6,31 s vs 7,38 s).

P7i goes from 0 to 100 km/h in 6,31 seconds (calibrated simulation).

P7i: 282 hp, ratio 7,18 kg/hp. 120d F40: 190 hp, ratio 7,63 kg/hp.

P7i: 200 km/h. 120d F40: 231 km/h.