With its rear-mounted six-cylinder boxer-style engine, distinctive design, and wide stance set low to the ground, the Porsche 911 is instantly recognizable, and is as desirable today as it was the day it first hit the streets in 1964. Perhaps even more so, since for 2007 Porsche added two new models to the 911 lineup. The Porsche 911 GT3 was powered by a 3.6-liter, six-cylinder engine that produces 415 horsepower, driving the vehicle from 0 to 60 in 4.1 seconds. The engine was linked to a six-speed manual transmission with a short-shift gear lever for fast, accurate gear selection. Standard features included 19-inch GT3 wheels, traction control, Porsche's Active Suspension Management system for selectable suspension modes, an anti-theft alarm system, dual front advanced airbags, Bi-Xenon headlights, adaptive sports seats, power windows, and cruise control. Also new for 2007 was the 911 Turbo. It also was equipped with a 3.6-liter six-cylinder engine, but twin turbos that pumped the horsepower up to 480. That drove the vehicle from 0 to 60 in 3.7 seconds with a manual six-speed transmission, and just 3.4 seconds when the 911 Turbo was equipped with the optional five-speed Tiptronic S automatic transmission, which optimized shift points. Features for the 911 Turbo included electrically adjustable seats for both the driver and passenger, a leather-wrapped three-spoke steering wheel, heated exterior mirrors, a filtered climate control system, advanced airbags, and Porsche's Stability Management system. The two new models joined a lineup that also included the 325-horsepower 911 Carrera and Carrera 4, the 355-horsepower Carrera S, and the 355-horsepower Carrera 4S. The 911 is one of the most coveted cars in the world, and driver's comments reflected that fact. Drivers noted that the 911 handled well, even when it was driven to the limit, and that it is a fun car to drive.