I would still take the GT4.
Porsche 911 Carrera S Powerkit X51 vs Porsche 911 Carrera GTS vs Porsche Cayman GT4 vs Porsche 911 R
| Category | 911 | Cayman GT4 | 911 | 911 R |
|---|---|---|---|---|
| Max power (ps) | 430 | 385 | 430 | 500 |
| Max torque (Nm) | 440 | 419 | 440 | 460 |
| Curb weight (kg) | 1415 | 1360 | 1470 | 1396 |
| Power / tonne (ps) | 304 | 283 | 293 | 358 |
Lap Times
| Track | 911 | Cayman GT4 | 911 | 911 R |
|---|---|---|---|---|
| Circuit de Nevers Magny-Cours Club | 1:22.89 | 1:20.28 | 1:21.61 | 1:19.10 |
Performance
| Category | 911 | Cayman GT4 | 911 | 911 R |
|---|---|---|---|---|
| 0 - 100 kph | 4.0 s | 4.3 s | 3.8 s | 3.6 s |
| 0 - 200 kph | 14.3 s | 13.7 s | 13.0 s | 10.7 s |
| 1000 m | 22.5 s | 22.5 s | 21.8 s | 20.5 s |
| Est. 100 - 200 kph | 10.3 s | 9.8 s | 10.1 s | 7.7 s |
| 0 - 60 mph | 3.8 s | 4.0 s | 3.6 s | 3.4 s |
| 0 - 100 mph | 9.5 s | 9.0 s | 8.4 s | 7.4 s |
| Est. 1/8 mile | 8.5 s | 8.8 s | 8.5 s | 8.2 s |
| 1/4 mile | 12.7 s | 12.3 s | 11.9 s | 11.4 s |
| Top speed | 308 kph | 295 kph | 305 kph | 323 kph |
| Est. max acceleration | 0.77 g | 0.67 g | 0.74 g | 0.77 g |
Summary
| Category | 911 | Cayman GT4 | 911 | 911 R |
|---|---|---|---|---|
| Track Performance | 87 | 96 | 91 | 100 |
| Straight line speed | 67 | 65 | 77 | 100 |
| Overall | 79 | 83 | 85 | 100 |
Verdict
911 R is the fastest by considerable margin.
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Acceleration graph
