Acabien GTBO is powered by a 700 bhp turbocharged motor giving it a power-to-weight ratio better than anything ever conceived for road usage and is claimed to be capable of 450 km/h. Giz Magazine describes, "The GTBO is a two-plus-two-wheel concept. It runs on four wheels at low speeds and two wheels at high speeds. The sidewheels can be ordered as lightweight racing-versions (pictured) or with heavier but more practical struts with a compact hydraulic drive so you can manoeuvre quite easily. The aim is to offer a limited edition, very expensive super vehicle with Swiss precision engineering and craftsmanship and a performance factor that is truly remarkable â€“ the power-to weight of the GTBO is 0.51 kg per horsepower â€“ compare that to the Ultima GTR (1.38 kg/bhp), Koenigsegg CCXR (1.16), Pagani Zonda F (2.07), Bugatti Veyron (1.89), Tramontana (1.74), Bristol Fighter T (1.58) and the Gumpert Apollo (1.53).