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Home›Duel›BMW M8 vs Porsche 911

Performance comparison

BMW M8 Competition Coupe F92 vs Porsche 911 Turbo S Cabriolet 991.2: 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.

BMWPetrol

M8 Competition Coupe F92

625 hp · 750 Nm · 1,900 kg · 2021

VS
PorschePetrolFaster

911 Turbo S Cabriolet 991.2

588 hp · 700 Nm · 1,670 kg · 2017

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.

M8 Competition Coupe F92911 Turbo S Cabriolet 991.2
0–100 km/h3,17 s2,95 s+0,23 s
400 m standing start11,04 s10,56 s+0,48 s
1,000 m standing start20,15 s19,13 s+1,02 s
Top speed (electronically limited)250 km/h329 km/h−79 km/h
Power-to-weight ratio3,04 kg/hp2,84 kg/hpbetter ratio

Watch the race

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

BMWPetrolM8 Competition Coupe F92
Speed
0km/h
Timer
0,00s
Distance
0m
PorschePetrol911 Turbo S Cabriolet 991.2
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.

PalierM8 Competition Coupe F92911 Turbo S Cabriolet 991.2
0–30 km/h0,97 s0,86 stight gap
0–50 km/h1,61 s1,44 s
0–80 km/h2,52 s2,32 s
0–100 km/h3,17 s2,95 s
0–120 km/h3,98 s3,76 s
0–160 km/h6,51 s5,83 s
0–200 km/h10,26 s8,76 s
400 m standing start11,04 s10,56 s
1,000 m standing start20,15 s19,13 s
Top speed limited250 km/h329 km/h

Under the bonnet

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

BMW

M8 Competition Coupe F92

3,04kg/hpcompensated by −230 kg
CharacteristicValueDetail
Power625 hpPending
Torque750 Nm
Weight1 900 kgmanufacturer kerb weight
DrivetrainIntegrale (AWD)
GearboxEight-speed M Steptronic transmission with Drivelogic, transmission oil cooling
Porsche

911 Turbo S Cabriolet 991.2

2,84kg/hpratio better by 0,20 kg/hp
CharacteristicValueDetail
Power588 hpB6
Torque700 Nm
Weight1 670 kgmanufacturer kerb weight
DrivetrainIntegrale (AWD)
GearboxDUAL_CLUTCH

The start: 0 to 100 km/h

Off the line, the 911 Turbo S Cabriolet hits 100 km/h in 2.95 s versus 3.18 s for the Bmw M8 Competition Coupe. At this point, the 911 Turbo S Cabriolet leads by 0.23 s and sits roughly 4 m ahead.

From 100 km/h to 400 metres

At 200 metres, the 911 Turbo S Cabriolet is doing 176 km/h against 169 km/h for the Bmw M8 Competition Coupe. The gap is 0.27 s. The gap remains stable from the start.

At 400 metres standing start, the 911 Turbo S Cabriolet crosses the line in 10.56 s versus 11.04 s. The 0.48 s gap represents roughly 27 m of track — two to three car lengths.

Beyond 400 metres: top speed comes into play

Past 400 metres, the 911 Turbo S Cabriolet continues to build its lead. At 600 metres, it runs at 246 km/h versus 232 km/h. At 1,000 metres, the 911 Turbo S Cabriolet finishes in 19.13 s versus 20.15 s, with a 1.02 s lead.

What the numbers don’t tell you

Both rivals are electronically governed, but not at the same level: the Bmw M8 Competition Coupe is capped at 250 (i.e. 155 mph — industry threshold) km/h, the 911 Turbo S Cabriolet at 330 (i.e. 205 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 (3.04 kg/hp vs 2.84 kg/hp) and transmission (Automatic vs Automatic).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 4.53 seconds. The 0.23 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 M8 Competition Coupe F92
Ferrari 812 GTSPorsche 911 Turbo SNissan GT-R 570 R35
Instead of 911 Turbo S Cabriolet 991.2
Ferrari F8 SpiderBmw M8 Competition ConvertibleMercedes Maybach SL 680 Monogram Series Roadster

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Frequently asked questions

Sur 0–100 km/h, 911 Turbo S Cabriolet 991.2 gagne (2,95 s vs 3,17 s).

M8 Competition Coupe F92 passe de 0 à 100 km/h en 3,17 secondes (simulation calibrée).

M8 Competition Coupe F92 : 625 hp, ratio 3,04 kg/hp. 911 Turbo S Cabriolet 991.2 : 588 hp, ratio 2,84 kg/hp.

M8 Competition Coupe F92 : 250 km/h. 911 Turbo S Cabriolet 991.2 : 329 km/h.