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  • SpecsPanamera · 840i

Porsche Panamera vs BMW 840i xDrive Gran Coupe G15: 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.

limousine · 2018 vs 2020 · Methodology
PorschePetrol

Panamera

335 hp · 449 Nm · 1,815 kg · 2018

VS
BMWPetrol

840i xDrive Gran Coupe G15

333 hp · 500 Nm · 1,875 kg · 2020

Result · 0–100 km/h

APorsche Panamera

5.28 s

Gap0.10 sNot a significant gap
BBMW 840i xDrive Gran Coupe G15

5.18 s

Summary · Caralogy simulation
MeasurePanamera840i xDrive Gran Coupe G15Gap
0–100 km/h5.28 s5.18 s0.10 s · 840i xDrive Gran Coupe G15
400 m standing start13.58 s13.44 s0.14 s · 840i xDrive Gran Coupe G15
1,000 m standing start24.66 s24.41 s0.25 s · 840i xDrive Gran Coupe G15
Top speed (electronically limited)264 km/h250 km/h14 km/h · Panamera
Power-to-weight ratio5.42 kg/hp5.63 kg/hpbetter ratio · Panamera

Watch the race

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

PorschePetrolPanamera
Speed
0km/h
Timer
0,00s
Distance
0m
BMWPetrol840i xDrive Gran Coupe G15
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.
StagePanamera840i xDrive Gran Coupe G15
0–30 km/h1.40 s1.29 s · tight gap
0–50 km/h2.30 s2.16 s · tight gap
0–80 km/h3.87 s3.73 s · tight gap
0–100 km/h5.28 s5.18 s · tight gap
0–120 km/h7.13 s6.95 s
0–160 km/h12.03 s11.83 s
0–200 km/h20.06 s19.35 s
400 m standing start13.58 s13.44 s · tight gap
1,000 m standing start24.66 s24.41 s
Top speed limited264 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

Panamera

5,42kg/hpratio better by 0,21 kg/hp
CharacteristicValueDetail
Power335 hpV6
Torque449 Nm
Weight1 815 kgmanufacturer kerb weight
DrivetrainPropulsion
GearboxDUAL_CLUTCH
BMW

840i xDrive Gran Coupe G15

5,63kg/hpcompensated by −60 kg
CharacteristicValueDetail
Power333 hpPending
Torque500 Nm
Weight1 875 kgmanufacturer kerb weight
DrivetrainIntegrale (AWD)
Gearbox8-speed Steptronic

The start: 0 to 100 km/h

Off the line, the 840i xDrive Gran Coupe hits 100 km/h in 5.18 s versus 5.28 s for the Panamera. The 0.10 s gap is negligible: both vehicles are neck and neck.

From 100 km/h to 400 metres

At 200 metres, the 840i xDrive Gran Coupe is doing 137 km/h against 136 km/h for the Panamera. The gap is 0.12 s. The gap remains stable from the start.

At 400 metres standing start, the 840i xDrive Gran Coupe crosses the line in 13.44 s versus 13.57 s. The 0.14 s gap represents roughly 6 m of track - barely a car length.

Beyond 400 metres: top speed comes into play

Past 400 metres, the 840i xDrive Gran Coupe continues to build its lead. At 600 metres, it runs at 191 km/h versus 190 km/h. At 1,000 metres, the 840i xDrive Gran Coupe finishes in 24.41 s versus 24.66 s, with a 0.25 s lead. Both vehicles have similar top speeds (264 vs 250 (i.e. 155 mph - industry threshold) km/h), preventing any comeback.

What the numbers don’t tell you

The 840i xDrive Gran Coupe features all-wheel drive (AWD) against the Panamera’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 Panamera is capped at 264 km/h, the 840i xDrive Gran Coupe 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 (5.42 kg/hp vs 5.63 kg/hp) and transmission (Automatic vs Automatic).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 8.22 seconds. The 0.10 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 Panamera
Porsche Panamera 4
Instead of 840i xDrive Gran Coupe G15
BMW 840d xDriveBMW 840i Gran CoupeBMW 840i xDrive

Other duels you might be interested in

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Panamera vs 840i

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840i xDrive Gran Coupe vs Panamera 4

PorscheVSBMW

Panamera vs 840i

BMWVSPorsche

840i xDrive Gran Coupe vs Panamera 4 Sport Turismo

Frequently asked questions

Over 0–100 km/h, Panamera and 840i xDrive Gran Coupe G15 are neck and neck (5,18 s vs 5,28 s, no significant gap).

Panamera goes from 0 to 100 km/h in 5,28 seconds (calibrated simulation).

Panamera: 335 hp, ratio 5,42 kg/hp. 840i xDrive Gran Coupe G15: 333 hp, ratio 5,63 kg/hp.

Panamera: 264 km/h. 840i xDrive Gran Coupe G15: 250 km/h.