The Toyota X Runner is a four-wheel drive coupé utility concept vehicle designed and built by Toyota Australia in 2003.
The X-Runner was based on the Avalon, using the Avalon's front cabin, front sheet metal (except the grill) and mechanicals. The Avalon's chassis (the Toyota modular platform, also shared with the Camry) was stretched by 150mm just before the rear wheels. The 1MZ-FE engine was upgraded with a TRD supercharger and transmission is by a version of the viscous coupled four wheel drive system used in the Lexus RX300.
The front suspension kept the McPherson struts from the Avalon with upgraded brakes and 19" wheels. The rear suspension was modified from the Tarago 4WD.
Source: Wikipedia, 2011