The hotter Porsche 718 Cayman GT4 is expected to pack 450 horsepower.
Porsche presented the all-new 911 Turbo last week, but there are still plenty of new Porsche models on the horizon to look forward to. While the 718 Cayman GT4 is arguably the ultimate purist sports car thanks to its wonderful new 4.0-liter naturally-aspirated flat-six and a six-speed manual transmission, we've been eagerly anticipating the long-rumored hardcore RS version.
Prototypes of the Porsche 718 Cayman GT4 RS were first spotted last September, but the hardcore sports car appears to be getting closer to production as this latest prototype shows that development has progressed. Unlike the last prototype, this GT4 RS is sporting center look wheels, which have never been fitted to a Cayman before.
Another noticeable difference is that the rear ring is smaller. Whereas the previous prototype had a large provisional wing also seen on new GT3 prototypes, this one sports the same wing as the regular GT4, but we're expecting the production version to have a larger wing. Elsewhere, the rear side windows have been replaced with louvres to provide extra cooling for the engine.
Powering the Porsche 718 Cayman will be the same 4.0-liter flat-six as the regular GT4. In the standard car, this unit produces 414 horsepower and 309 lb-ft of torque, but the hardcore RS version is expected to increase the output to around 450 hp. Any more power would put the Cayman GT4 RS in 911 GT3 territory.
By adapting titanium connecting rods from the GT3, Markus Baumann, Porsche's Boxer engine development manager, confirmed Porsche won't need to resort to turbocharging to extract more power. As for the transmission, the 718 Cayman GT4 is currently only offered with a six-speed manual, but the track-focused RS version will likely be offered with a quick-shifting PDK transmission.
Porsche hasn't made any official announcements yet, but the Porsche 718 Cayman RS is expected to debut this summer and go on sale as a 2021 model.