Porsche Cayenne S
In the Cayenne S, the engine is normally aspirated yet still provides 340 horsepower (SAE) and makes even the basic Cayenne S among the strongest of all SUVs. The normally aspirated engine is rated at 310 lb.-ft. of torque, with maximum power provided all the way from 2,500 rpm to 5,500 rpm.
Working in conjunction with the new six-speed Tiptronic® S transmission, the normally aspirated 4.5-liter V8 propels the Cayenne S from a standing start to 62 mph (100 km/h) in only 7.2 seconds. The Cayenne S can achieve a top speed of 150 mph (242 km/h) on the test track.
The Cayenne S comes with Porsche Traction Management; Porsche Stability Management; front, side and curtain airbags; a Bose® Cabin Surround Sound System; leather upholstery; and automatic climate controls.
The V8 shares much of its internal architecture with the liquid-cooled six-cylinder engine that was developed to power the Porsche Boxster®. However, Porsche engineers developed specific components and dimensions for the Cayenne’s new V8. For example, while the 3.66-inch (93 mm) cylinder bore is the same as the Boxster’s, the V8 has a longer stroke of 3.27 inches (83 mm). The V8 has a two-piece cylinder head similar to that developed for the powerful 911 Turbo, and the Cayenne engine’s cylinder head makes use of an aluminum/silicon alloy that can withstand very high temperatures.
As with all other Porsche models, the new V8 makes use of Porsche’s VarioCam® technology. For the Cayenne’s V8, VarioCam can adjust the intake camshafts by as much as 25 degrees, ensuring outstanding torque characteristics as well as optimum fuel efficiency and lower emissions.
Source: Porsche press