Porsche Cayman GT4 On SIC/ 420 HP/ 8,000 RPM/ 6-Speed Manual/ What Smile Ratio? / YS Khong Driving
I was very impressed with the previous Porsche Cayman GT4 – That was some years ago, but here we are again, and this time it is at the Sepang International Circuit – Now with 420 horsepower, 420NM of torque, the Cayman will scream at 8,000 rpm.
The engine is from the 992, but it is now placed midship in the Cayman, a layout that is known for its superb handling characteristics. Six-pot calipers at the front, and four-pots at the back, with Carbon Ceramic Rotors provide sure-footed stopping power.
The GT4 brought a lot of smiles to me before – what would the smile ratio be? Well, I am masked in a balaclava – but you can see my eyes laugh.
The smile ratio is indeed somewhere between 9 and 10; Enjoy!


![[ID: HAaYzI7cVRo] Youtube Automatic](https://media.yskhongdriving.com/2026/05/11101207/id-haayzi7cvro-youtube-automatic-236x133.jpg)
![[ID: BG_H-9JnWXA] Youtube Automatic](https://media.yskhongdriving.com/2026/05/11101211/id-bgh-9jnwxa-youtube-automatic-236x133.jpg)
![[ID: iPtIjVyhy68] Youtube Automatic](https://media.yskhongdriving.com/2026/05/11101213/id-iptijvyhy68-youtube-automatic-236x133.jpg)
![[ID: qAIYM56H5Qg] Youtube Automatic](https://media.yskhongdriving.com/2026/05/11101216/id-qaiym56h5qg-youtube-automatic-236x133.jpg)
![[ID: ggrTof_UcEs] Youtube Automatic](https://media.yskhongdriving.com/2026/05/11101218/id-ggrtofuces-youtube-automatic-236x133.jpg)
![[ID: wusF–PZs5E] Youtube Automatic](https://media.yskhongdriving.com/2026/05/11101221/id-wusf-pzs5e-youtube-automatic-236x133.jpg)
![[ID: RbqvSxbeVpw] Youtube Automatic](https://media.yskhongdriving.com/2026/05/11101223/id-rbqvsxbevpw-youtube-automatic-236x133.jpg)
![[ID: H-YypXANd0I] Youtube Automatic](https://media.yskhongdriving.com/2026/05/11101226/id-h-yypxand0i-youtube-automatic-236x133.jpg)
![[ID: KULBYlaPwko] Youtube Automatic](https://media.yskhongdriving.com/2026/05/11101228/id-kulbylapwko-youtube-automatic-236x133.jpg)
![[ID: k6DlH9GIPdE] Youtube Automatic](https://media.yskhongdriving.com/2026/05/11101232/id-k6dlh9gipde-youtube-automatic-236x133.jpg)