The 2009 Toyota Camry Hybrid uses the Hybrid Synergy Drive system which, like the Prius, employs a frugal four-cylinder engine teamed with a powerful electric motor. Unlike the Prius, the Camry Hybrid does not stand out in a crowd, an important difference for the eco-friendly driver who prefers to remain anonymous. In fact, about the only noticeable differences between the Camry Hybrid and its gasoline-powered equivalent are a smaller trunk (due to the placement of the battery pack), a slightly smaller fuel tank and the obvious Hybrid Synergy Drive badges.