Is the Cayenne S V8 Porsche own engine? Or is it from VW?

 

From my understanding, the CS' V8 is Porsche's own engine. The V6 in the Cayenne is VW sourced, however, the V6 in the Panamera is a Porsche engine.

 

The V8 is a Porsche engine and shared with the Panamera platform. From Wikipedia for the current model year;

"The Cayenne's naturally-aspirated and turbocharged V8 engines are shared with the Panamera and have been upgraded for faster acceleration times with more horsepower and torque, as well as more powerful direct injection technology to improve efficiency. The base Cayenne model still shares its Volkswagen-sourced VR6 engine with the new Volkswagen Touareg, although the Cayenne's is tuned to offer 300 horsepower compared to the Touareg's 280.


Porsche Cayenne hybrid drivetrain.


The Cayenne comes powered by a 3.6 L V6 engine producing 300 PS (221 kW; 296 hp), the Cayenne S features the same 4.8 L V8 in the Panamera S models producing 400 PS (294 kW; 395 hp) and the Cayenne Turbo comes with Panamera Turbo's 4.8 L twin turbo V8 producing 500 PS (368 kW; 493 hp).[16] The Cayenne S Hybrid uses an Audi-sourced 3.0 L V6 engine producing 333 PS (245 kW; 328 hp) paired with a lithium ion battery capable of 47 PS (35 kW; 46 hp) for a total of 380 PS (279 kW; 375 hp).[19] A manual gearbox serves as the standard transmission system on the base Cayenne, with all other models featuring an eight-speed Tiptronic as standard equipment. The low-range transfer case found in the previous generation has been removed. All vehicles will feature approximately 10 percent less weight than their predecessors, 70 kilograms worth of standard equipment in excess of that found on the current model and a more heavily contoured rear bench.
In September 2012 Porsche announced the Cayenne S Diesel.[20] This model is fitted with the Audi 4.2 V8 TDI engine.
In October 2012 Porsche confirmed the all new Cayenne Turbo S.[21]"

 

Thanks for the info.