The Volkswagen Phaeton Individual Lounge Study, shown in 2005, was a one-off stretch version of the first-generation VW Phaeton luxury sedan. It was created as a design and engineering study to show how the Phaeton could be turned into a limousine-style vehicle, and it was unveiled at a Middle East motor show. Based on a lengthened Phaeton body, the Lounge Study stretched the wheelbase significantly to add more rear cabin space. It reportedly used the Phaeton’s powerful W12 e

The Mitsubishi Eclipse Ralliart concept, shown in 2005 at SEMA, was a one-off performance prototype built to show what a rally-inspired Eclipse could look like. It featured custom carbon-fiber bodywork, all-wheel drive, and a turbocharged 4G63 engine borrowed from the Lancer Evolution, producing around 400 hp.

The MG X11 concept, shown in 2001, was a preview of the performance-focused MG ZT-T estate based on the Rover 75 platform. The production MG ZT-T followed shortly after and was built between 2001 and 2005, offering sportier styling and suspension compared to the standard Rover 75.