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  • Specs840i · Panamera 4

BMW 840i Gran Coupe G15 vs Porsche Panamera 4: 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 · 2021 vs 2018 · Methodology
BMWPetrol

840i Gran Coupe G15

333 hp · 500 Nm · 1,815 kg · 2021

VS
PorschePetrol

Panamera 4

330 hp · 449 Nm · 2,008 kg · 2018

Result · 0–100 km/h

ABMW 840i Gran Coupe G15

5.46 s

Gap0.01 sNot a significant gap
BPorsche Panamera 4

5.45 s

Summary · Caralogy simulation
Measure840i Gran Coupe G15Panamera 4Gap
0–100 km/h5.46 s5.45 s0.01 s · Panamera 4
400 m standing start13.70 s13.78 s0.08 s · 840i Gran Coupe G15
1,000 m standing start24.69 s25.22 s0.53 s · 840i Gran Coupe G15
Top speed (electronically limited)250 km/h257 km/h7 km/h · Panamera 4
Power-to-weight ratio5.45 kg/hp6.08 kg/hpbetter ratio · 840i Gran Coupe G15

Watch the race

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

BMWPetrol840i Gran Coupe G15
Speed
0km/h
Timer
0,00s
Distance
0m
PorschePetrolPanamera 4
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.
Stage840i Gran Coupe G15Panamera 4
0–30 km/h1.50 s1.27 s
0–50 km/h2.46 s2.16 s
0–80 km/h4.03 s3.90 s · tight gap
0–100 km/h5.46 s5.45 s · tight gap
0–120 km/h7.25 s7.52 s
0–160 km/h12.12 s13.02 s
0–200 km/h19.69 s22.27 s
400 m standing start13.70 s · tight gap13.78 s
1,000 m standing start24.69 s25.22 s
Top speed limited250 km/h257 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.

BMW

840i Gran Coupe G15

5,45kg/hpratio better by 0,63 kg/hp
CharacteristicValueDetail
Power333 hp6 cyl
Torque500 Nm
Weight1 815 kgmanufacturer kerb weight
Drivetrain-
Gearbox8-speed Steptronic
Porsche

Panamera 4

6,08kg/hpcompensated by −193 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 Panamera 4 hits 100 km/h in 5.45 s versus 5.46 s for the 840i Gran Coupe. The 0.01 s gap is negligible: both vehicles are neck and neck.

From 100 km/h to 400 metres

At 200 metres, the Panamera 4 is doing 132 km/h against 137 km/h for the 840i Gran Coupe. The gap is 0.08 s. The gap widens compared to the 0-100.

At 400 metres standing start, the 840i Gran Coupe crosses the line in 13.69 s versus 13.78 s. The 0.08 s gap represents roughly 4 m of track - barely a car length.

Beyond 400 metres: top speed comes into play

Past 400 metres, the 840i Gran Coupe continues to build its lead. At 600 metres, it runs at 191 km/h versus 184 km/h. At 1,000 metres, the 840i Gran Coupe finishes in 24.68 s versus 25.22 s, with a 0.54 s lead. Both vehicles have similar top speeds (250 (i.e. 155 mph - industry threshold) vs 257 km/h), preventing any comeback.

What the numbers don’t tell you

On paper, the 840i Gran Coupe combines 333 hp, 500 Nm and 1,815 kg - a clear theoretical edge over the Panamera 4. Yet the Panamera 4 launches quicker. At standstill, both motors deliver peak torque from 0 rpm: the decisive factor is no longer raw power, but available grip. If the Panamera 4 has a better traction coefficient (tyres, weight distribution, traction control calibration), it puts down more force despite inferior specs - exactly what the simulation reflects, calibrated on manufacturer 0-100 km/h times.

Both rivals are electronically governed, but not at the same level: the 840i Gran Coupe is capped at 250 (i.e. 155 mph - industry threshold) km/h, the Panamera 4 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 (5.45 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 8.74 seconds. The 0.01 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 Gran Coupe G15
BMW 840i Gran CoupeBMW 840i xDriveBMW 840i xDrive
Instead of Panamera 4
Porsche Panamera

Other duels you might be interested in

PorscheVSBMW

Panamera vs 840i Gran Coupe

BMWVSPorsche

840i vs Panamera 4

BMWVSPorsche

840i Gran Coupe vs Panamera 4 Sport Turismo

BMWVSPorsche

840i vs Panamera 4

Frequently asked questions

Over 0–100 km/h, 840i Gran Coupe G15 and Panamera 4 are neck and neck (5,45 s vs 5,46 s, no significant gap).

840i Gran Coupe G15 goes from 0 to 100 km/h in 5,46 seconds (calibrated simulation).

840i Gran Coupe G15: 333 hp, ratio 5,45 kg/hp. Panamera 4: 330 hp, ratio 6,08 kg/hp.

840i Gran Coupe G15: 250 km/h. Panamera 4: 257 km/h.