If you just looked at the spec sheets for the Porsche Cayman GT4 and Cayman GTS 4.0, you might be forgiven for assuming they were nearly identical. However, as Engineering Explained points out in this interesting video, there are several differences between the two.
The aerodynamics of the Cayman GT4 are compared to the more affordable GTS 4.0 for the majority of this video. There are some noticeable variations, such as the GT4's large rear diffuser and fixed rear wing. There are a few less noticeable variations as well.
The underside of the Cayman GT4's front bumper, for example, has a dimpled surface similar to that of a golf ball. According to Porsche, this nature allows air to follow the contours of the car more precisely, minimizing drag. It's an intriguing aspect that you wouldn't notice unless you looked under the GT4's evocative bodywork.
Jason also points out the differences between the two engines in this video. Both cars have a 4.0-liter naturally aspirated six-cylinder engine, but it's not the same as the Porsche 911 GT3's. Instead, the Cayman's 4.0-liter engine began life as the Carrera's twin-turbo 3.0-liter, but it no longer has such turbochargers and has been increased in displacement to 4.0 liters. The Cayman GT4's engine is rated at 414 horsepower and 310 pound-feet (420 Nm), while the GTS 4.0's engine is rated at 394 horsepower and 309 pound-feet (418 Nm).
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