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  • SpecsPanamera · 840i

Porsche Panamera vs BMW 840i Convertible 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 2021 · Methodology
PorschePetrolFaster

Panamera

335 hp · 449 Nm · 1,815 kg · 2018

VS
BMWPetrol

840i Convertible G15

333 hp · 500 Nm · 1,840 kg · 2021

Result · 0–100 km/h

APorsche Panamera

5.28 s

Gap0.29 sin favour of Panamera
BBMW 840i Convertible G15

5.57 s

Summary · Caralogy simulation
MeasurePanamera840i Convertible G15Gap
0–100 km/h5.28 s5.57 s0.29 s · Panamera
400 m standing start13.58 s13.79 s0.21 s · Panamera
1,000 m standing start24.66 s24.82 s0.16 s · Panamera
Top speed (electronically limited)264 km/h250 km/h14 km/h · Panamera
Power-to-weight ratio5.42 kg/hp5.53 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 Convertible 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 Convertible G15
0–30 km/h1.40 s · tight gap1.54 s
0–50 km/h2.30 s2.50 s
0–80 km/h3.87 s4.11 s
0–100 km/h5.28 s5.57 s
0–120 km/h7.13 s7.39 s
0–160 km/h12.03 s12.34 s
0–200 km/h20.06 s19.98 s · tight gap
400 m standing start13.58 s13.79 s
1,000 m standing start24.66 s24.82 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 0,11 kg/hp
CharacteristicValueDetail
Power335 hpV6
Torque449 Nm
Weight1 815 kgmanufacturer kerb weight
DrivetrainPropulsion
GearboxDUAL_CLUTCH
BMW

840i Convertible G15

5,53kg/hp
CharacteristicValueDetail
Power333 hp6 cyl
Torque500 Nm
Weight1 840 kgmanufacturer kerb weight
Drivetrain-
Gearbox8-speed Steptronic

The start: 0 to 100 km/h

Off the line, the Panamera hits 100 km/h in 5.28 s versus 5.57 s for the 840i Convertible. At this point, the Panamera leads by 0.29 s and sits roughly 5 m ahead.

From 100 km/h to 400 metres

At 200 metres, the Panamera is doing 136 km/h against 136 km/h for the 840i Convertible. The gap is 0.20 s. The gap remains stable from the start.

At 400 metres standing start, the Panamera crosses the line in 13.57 s versus 13.79 s. The 0.22 s gap represents roughly 10 m of track - two to three car lengths.

Beyond 400 metres: top speed comes into play

Past 400 metres, the gap narrows. The 840i Convertible maxes out at 250 (i.e. 155 mph - industry threshold) km/h while the Panamera keeps accelerating towards 264 km/h. At 600 metres, the gap has dropped to 0.20 s.

At 1,000 metres, the Panamera finishes in 24.66 s versus 24.82 s, with just 0.16 s to spare. The 840i Convertible fails to fully close the launch gap.

What the numbers don’t tell you

Both rivals are electronically governed, but not at the same level: the Panamera is capped at 264 km/h, the 840i Convertible 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 5.53 kg/hp) and transmission (Automatic vs Automatic).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 8.44 seconds. The 0.29 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 Convertible G15
BMW 840d xDrive ConvertibleBMW 840i ConvertibleBMW 840i Convertible

Other duels you might be interested in

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Panamera vs 840i

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840i Convertible vs Panamera 4

PorscheVSBMW

Panamera vs 840i

BMWVSPorsche

840i Convertible vs Panamera 4 Sport Turismo

Frequently asked questions

Over 0–100 km/h, Panamera wins (5,28 s vs 5,57 s).

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

Panamera: 335 hp, ratio 5,42 kg/hp. 840i Convertible G15: 333 hp, ratio 5,53 kg/hp.

Panamera: 264 km/h. 840i Convertible G15: 250 km/h.