Porsche Cayman 981 GT4 Street version (2015-2016)

Official photos: 2015 February 4
Premiere: 2015 March 3, Geneva Motor Show
Market launch: 2015 March

Technical specification and comparison

Modification	Engine	kW	lb-ft	Nm	Gearbox	60 mph	100 km/h	160 km/h	200 km/h	mph	km/h	DIN kg	DIN lb	W/lb	W/kg	Nord- schleife
Cayman 981 GT4	3.8B6	283	309	420	manual 6-speed	4.2 sec.	4.4 sec.	9.3 sec.	14.5 sec.	183	295	1340	2954	96	211	7:42
911 991 GT3	3.8B6	350	324	440	PDK 7-speed	3.3 sec.	3.5 sec.	7.5 sec.	11.4 sec.	196	315	1430	3153	111	245	7:30

DIN weight = car with 90% fuel, no driver, no cargo. Weight of German versions with standard equipment.

The GT4 was basically a Cayman with the chassis from the 991 GT3 and the engine from the 997.2/991 Carrera S. The GT4 was 38% cheaper than the GT3. To fit into the Cayman, the 911 engine had to be modified a bit, so it got different crankcase and naturally different intake system. The GT3 chassis made the GT4 1.2"/30 mm lower than standard Cayman. The brakes were also directly from the 991 GT3, with 380 mm discs front and rear. The GT4 was equipped with the best road legal racing tyres, the Michelin Pilot Sport Cup 2. Like with the GT3 (or any other racing car), the interior was available only in black in order to not to distract driver's vision away from the road.

The standard equipment of the GT4 included:

Adjustable racing suspension (toe, camber, stabilizers)
LSD Limited Slip Differential with asymmetrical locking (27% in acceleration, 22% in decelaration)
PTV Porsche Torque Vectoring (brakes the rear inner wheel for quicker cornering)
PASM Porsche Active Suspension Management
PADM Porsche Active Drivetrain Mounts
Sports exhaust system
Variable ratio electric power steering
TPM Tyre Pressure Monitoring
20" wheels painted in Platinum (optionally in Silver or Black)
On request: deletion of air conditioner (or optionally a 2-zone automatic AC)
On request: deletion of audio system (4 speakers, CD-radio with 7" touchscreen, universal audio interface in glove compartment)

To shave a bit from the officially announced DIN curb weight (measured with 90% fuel), the standard fuel tank had only 54 litre capacity. In reality most of the cars were equipped with the no-cost 64 litre tank, which wasn't very large either.

From the optional equipment list the following could be needed: adaptive sports seats or bucket seats, Club Sport package (roll cage behind the seats, a 6-point racing harness in red for driver's side, a bigger fire extinguisher with mounting bracket and preparation for battery master switch). The optional equipment list continued with 6-point harness for the passenger, cruise control, stitching in red or yellow, 9 speaker sound system (heavy Bose system naturally not available for a track day car), navigation. The stop-watch in the Sport Chrono package still was useless as it was still unable to use car's own GPS signal. Much better (GPS-based) systems were available for lap timing. For example, from the App Store you could download the free Porsche Track Precision app for your smartphone. In addition to lap timing, the app communicated with the car for telemetrics (Sport Chrono package needed). The front part of the roll cage, the structural cross behind the seats, the battery master switch and the track day lap trigger could be purchased from Porsche Motorsport.

The fact that the automatic PDK gearbox was not available, made clear for whom this car was destined - to the Porsche drivers who enjoy the engagement in really mastering a car. The GT4 was able to lap the Nürburgring Nordschleife in 7:42.39.

The concept, the front spoiler look and the side air scoops remind a bit of the Lotus Exige© Porsche

Christian Gebhardt lapped the Nürburgring Nordschleife in 7:42,39 (Sport Auto 5/2015, Supertest)© Porsche

Porsche Cayman 981 GT4 side air inlet scoop — © Porsche

The forged wheels are 20", the fronts are 8.5" wide with 245/35 tyres and the rears are 11" with 295/30© Porsche

Porsche calls it a 'diffusor-look' rear under valance, so it is not an aerodynamic item© Porsche

Who could resist getting into such a car and out to the race track...© Porsche

Porsche Cayman 981 GT4 rear spoiler — © Porsche

Porsche Cayman 981 GT4 wheel and brake — The wheel design mimics that of the 991 GT3, but has conventional easy-to-live-with 5-bolt arrangement instead of the central locking system© Porsche

Michelin Pilot Sport 2 road legal racing tyres© Porsche

The Sport-button activates automatic throttle-blipping for downshifts © Porsche

Porsche Cayman 981 GT4 cockpit, bucket seats — The bucket seats must be specified first and then the Club Sport roll cage can be ordered© Porsche

Bucket seats and Club Sport package (roll cage, 6-point harness, fire extinguisher and preparation for battery disconnection switch)© Porsche

Optional adaptive sports seat, standard sports seat and optional bucket seat© Porsche

Porsche Track Precision App saves the video and telemetrics © Porsche

Porsche Cayman GT4 3.8-litre engine — 283 kW 3.8-litre 6-cylinder boxer of the 997.2 Carrera S used in the Cayman GT4. The same engine was also used in 991 Carrera S (294 kW).© Porsche

Andreas Preuninger, head of GT cars at Porsche, interviewed by EVO

Cayman 981 GT4 wrapped for delivery — Wrapped for transport © Porsche

PDF

Cayman GT4

2/2015 · German

Cayman GT4 3.8

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Continue to GT4 Racing version or to 991 GT3

Anniversaries: Mar, 05 – 8th birthday of the 991 GT3 (2013); Mar, 05 – 18th birthday of the Carrera GT (2003); Mar, 06 – 9th birthday of the Boxster 981 (2012); Mar, 12 – 52nd birthday of the 917 (1969); Mar, 13 – 60th birthday of Ferdinand Oliver Porsche (1961)