- Limited Edition - Last of the Naturally Aspirated Manual Porsches - Very High Specification - Porsche Manufacturer's Warranty until January 2019 - UK Supplied Developed by the same team who brought us the hugely successful and spectacular 991 GT3, it is thought that the Cayman GT4 is the car that maximizes the potential of the Cayman's excellent mid-engine chassis. In terms of performance, the power is provided by a 3.8L flat-six 911 Carrera S engine tuned by the Porsche Motor Sport division to provide 385 bhp and 310lb ft of torque. 0 to 62 mph is dealt in 4.4 seconds and the top speed is 183 mph. This phenomenal performance is transferred through a 6 speed manual gearbox from the Cayman GTS. The chassis of the GT4 is what makes this car stand out from all other Caymans. This is because many parts have been borrowed from the GT3 such as the front suspension, 245-section front tyres, brakes set up and the car offers the same level of aerodynamic downforce (100kg) at top speed to be precise. Only differences between the Cayman and the GT3 are that the rear is almost completely new, with a mechanical limited-slip differential and the absence of rear wheel steering functionality on the GT4. A great deal of work has also gone into revamping the electric steering system which is said to offer more feel and precision in comparison to the GT3. All of these changes have proved significant as Porsche claim the GT4 to have completed the legendary Nurburgring in just 7 minutes and 40 seconds of which to put it into perspective is the same lap time as the mighty McLaren SLR, Lamborghini Murcielago LP640 and quicker than the Lamborghini Gallardo Superleggera and BMW M3 GTS.