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Porsche 911 GT3 RS 991.1 vs Porsche 911 Carrera 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.

sports car · 2011 vs 2017 · Methodology
PorschePetrolFaster

911 GT3 RS 991.1

500 hp · 460 Nm · 1,370 kg · 2011

VS
PorschePetrol

911 Carrera Cabriolet 991.2

375 hp · 449 Nm · 1,500 kg · 2017

Result · 0–100 km/h

APorsche 911 GT3 RS 991.1

3.85 s

Gap0.57 sin favour of 911 GT3 RS
BPorsche 911 Carrera Cabriolet 991.2

4.42 s

Summary · Caralogy simulation
Measure911 GT3 RS 991.1911 Carrera Cabriolet 991.2Gap
0–100 km/h3.85 s4.42 s0.57 s · 911 GT3 RS 991.1
400 m standing start11.57 s12.42 s0.85 s · 911 GT3 RS 991.1
1,000 m standing start20.64 s22.28 s1.64 s · 911 GT3 RS 991.1
Top speed (electronically limited)314 km/h286 km/h28 km/h · 911 GT3 RS 991.1
Power-to-weight ratio2.74 kg/hp4.00 kg/hpbetter ratio · 911 GT3 RS 991.1

Watch the race

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

PorschePetrol911 GT3 RS 991.1
Speed
0km/h
Timer
0,00s
Distance
0m
PorschePetrol911 Carrera 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. Best value in bold.
Stage911 GT3 RS 991.1911 Carrera Cabriolet 991.2
0–30 km/h1.05 s1.28 s
0–50 km/h1.75 s2.13 s
0–80 km/h3.08 s3.46 s
0–100 km/h3.85 s4.42 s
0–120 km/h4.96 s5.67 s
0–160 km/h7.29 s8.88 s
0–200 km/h10.82 s13.70 s
400 m standing start11.57 s12.42 s
1,000 m standing start20.64 s22.28 s
Top speed314 km/h286 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

911 GT3 RS 991.1

2,74kg/hpratio better by 1,26 kg/hp
CharacteristicValueDetail
Power500 hpB6
Torque460 Nm
Weight1 370 kgmanufacturer kerb weight
DrivetrainPropulsion
GearboxMANUAL
Porsche

911 Carrera Cabriolet 991.2

4,00kg/hpcompensated by −130 kg
CharacteristicValueDetail
Power375 hpB6
Torque449 Nm
Weight1 500 kgmanufacturer kerb weight
DrivetrainPropulsion
GearboxDUAL_CLUTCH

The start: 0 to 100 km/h

Off the line, the 911 GT3 RS hits 100 km/h in 3.85 s versus 4.43 s for the 911 Carrera Cabriolet. At this point, the 911 GT3 RS leads by 0.57 s and sits roughly 8 m ahead.

From 100 km/h to 400 metres

At 200 metres, the 911 GT3 RS is doing 164 km/h against 153 km/h for the 911 Carrera Cabriolet. The gap is 0.55 s. The gap remains stable from the start.

At 400 metres standing start, the 911 GT3 RS crosses the line in 11.57 s versus 12.42 s. The 0.85 s gap represents roughly 44 m of track - a gap visible to the naked eye.

Beyond 400 metres: top speed comes into play

Past 400 metres, the 911 GT3 RS continues to build its lead. At 600 metres, it runs at 232 km/h versus 214 km/h. At 1,000 metres, the 911 GT3 RS finishes in 20.63 s versus 22.28 s, with a 1.64 s lead.

What the numbers don’t tell you

Electronically capped at 291 km/h, the 911 Carrera Cabriolet never reaches its natural aerodynamic ceiling in this duel. That’s not a physical limit of the motor - it’s a deliberate manufacturer decision, typically tied to standard-fit tyre ratings or model-range positioning.

With two combustion powertrains, the difference comes down to power-to-weight ratio (2.74 kg/hp vs 4.00 kg/hp) and transmission (Manual vs Automatic).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 6.39 seconds. The 0.57 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.

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Frequently asked questions

Over 0–100 km/h, 911 GT3 RS 991.1 wins (3,85 s vs 4,42 s).

911 GT3 RS 991.1 goes from 0 to 100 km/h in 3,85 seconds (calibrated simulation).

911 GT3 RS 991.1: 500 hp, ratio 2,74 kg/hp. 911 Carrera Cabriolet 991.2: 375 hp, ratio 4,00 kg/hp.

911 GT3 RS 991.1: 314 km/h. 911 Carrera Cabriolet 991.2: 286 km/h.