Porsche has introduced the latest Cayenne Turbo ahead of its official reveal at the 2021 Goodwood Festival of Speed. The top model in the Cayenne lineup, the fastback Turbo GT gets a 90 horsepower bump in power from last year's model, with 631 horsepower available from its twin-turbo four-liter V8. That increase comes thanks to a new crankshaft, turbos, revised intake, and a larger intercooler, along with a titanium exhaust system. The engine is backed by an eight-speed Tiptronic transmission with faster shifting, although this shouldn't be confused with Porsche's PDK dual-clutch unit. With its trick all-wheel-drive system, the Cayenne Turbo GT hits 62 MPH in 3.3 seconds and a top speed of 186 MPH, making it Porsche's fastest SUV ever.