As a replacement for the now defunct Grand Prix, the G8 is a sedan that originates in Australia, directly derived from the Holden Commodore. It is the largest sedan offered by Pontiac, and also the only one with a rear-wheel drive system. According to GM, the basic version, equipped with a V6 engine, should be the most popular, but fans of performance can opt for one of two models powered by powerful V8 engines.