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Home›Duel›BMW 840i vs Porsche Panamera 4

Performance comparison

BMW 840i xDrive Gran Coupe G15 vs Porsche Panamera 4 Sport Turismo 971: 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.

BMWPetrolFaster

840i xDrive Gran Coupe G15

333 hp · 500 Nm · 1,875 kg · 2021

VS
PorschePetrol

Panamera 4 Sport Turismo 971

330 hp · 449 Nm · 2,008 kg · 2018

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.

840i xDrive Gran Coupe G15Panamera 4 Sport Turismo 971
0–100 km/h5,03 s−0,11 s5,14 s
400 m standing start13,29 s−0,18 s13,47 s
1,000 m standing start24,12 s−0,50 s24,62 s
Top speed (electronically limited)250 km/h258 km/h−8 km/h
Power-to-weight ratio5,63 kg/hpbetter ratio6,08 kg/hp

Watch the race

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

BMWPetrol840i xDrive Gran Coupe G15
Speed
0km/h
Timer
0,00s
Distance
0m
PorschePetrolPanamera 4 Sport Turismo 971
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.

Palier840i xDrive Gran Coupe G15Panamera 4 Sport Turismo 971
0–30 km/h1,30 s1,24 stight gap
0–50 km/h2,15 s2,09 stight gap
0–80 km/h3,67 s3,70 stight gap
0–100 km/h5,03 s5,14 stight gap
0–120 km/h6,73 s7,05 s
0–160 km/h11,38 s12,07 s
0–200 km/h18,50 s20,28 s
400 m standing start13,29 s13,47 s
1,000 m standing start24,12 s24,62 s
Top speed limited250 km/h258 km/h

Under the bonnet

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

BMW

840i xDrive Gran Coupe G15

5,63kg/hpratio better by 0,45 kg/hp
CharacteristicValueDetail
Power333 hp6 cyl
Torque500 Nm
Weight1 875 kgmanufacturer kerb weight
DrivetrainIntegrale (AWD)
Gearbox8-speed Steptronic
Porsche

Panamera 4 Sport Turismo 971

6,08kg/hpcompensated by −133 kg
CharacteristicValueDetail
Power330 hpV6
Torque449 Nm
Weight2 008 kgmanufacturer kerb weight
DrivetrainIntegrale (AWD)
GearboxDUAL_CLUTCH

The start: 0 to 100 km/h

Off the line, the Bmw 840i xDrive Gran Coupe hits 100 km/h in 5.03 s versus 5.14 s for the Panamera 4 Sport Turismo. The 0.11 s gap is negligible: both vehicles are neck and neck.

From 100 km/h to 400 metres

At 200 metres, the Bmw 840i xDrive Gran Coupe is doing 139 km/h against 135 km/h for the Panamera 4 Sport Turismo. The gap is 0.06 s. The gap remains stable from the start.

At 400 metres standing start, the Bmw 840i xDrive Gran Coupe crosses the line in 13.29 s versus 13.47 s. The 0.18 s gap represents roughly 8 m of track — barely a car length.

Beyond 400 metres: top speed comes into play

Past 400 metres, the Bmw 840i xDrive Gran Coupe continues to build its lead. At 600 metres, it runs at 194 km/h versus 188 km/h. At 1,000 metres, the Bmw 840i xDrive Gran Coupe finishes in 24.11 s versus 24.62 s, with a 0.50 s lead. Both vehicles have similar top speeds (250 (i.e. 155 mph — industry threshold) vs 258 km/h), preventing any comeback.

What the numbers don’t tell you

Both rivals are electronically governed, but not at the same level: the Bmw 840i xDrive Gran Coupe is capped at 250 (i.e. 155 mph — industry threshold) km/h, the Panamera 4 Sport Turismo at 257 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 (5.63 kg/hp vs 6.08 kg/hp) and transmission (Automatic vs Automatic).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 8.17 seconds. The 0.11 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 840i xDrive Gran Coupe G15
Porsche 718 Cayman GT4Alpine A110 GT 300Jaguar F-TYPE P300
Instead of Panamera 4 Sport Turismo 971
Bmw M550d xDrive TouringAudi A6 Avant TFSI quattro S tronic 270 kWBmw M340i xDrive Touring

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Frequently asked questions

Sur 0–100 km/h, 840i xDrive Gran Coupe G15 gagne (5,03 s vs 5,14 s).

840i xDrive Gran Coupe G15 passe de 0 à 100 km/h en 5,03 secondes (simulation calibrée).

840i xDrive Gran Coupe G15 : 333 hp, ratio 5,63 kg/hp. Panamera 4 Sport Turismo 971 : 330 hp, ratio 6,08 kg/hp.

840i xDrive Gran Coupe G15 : 250 km/h. Panamera 4 Sport Turismo 971 : 258 km/h.