The Ultima GTR is a super car manufactured by Ultima Sports Ltd of Hinckley, Leicestershire, England, and described by commentators as a supercar. The car was available both in kit form and as a "turnkey" (i.e. assembled by the factory) vehicle until early 2015, when it was replaced by the Ultima Evolution. The design is mid engined, rear wheel drive layout, with a tubular steel space frame chassis and GRP bodywork. A convertible version called the Ultima Can-Am was also produced. Kit builders were free to source and fit a variety of engines and transmissions but the Chevrolet small block V8 supplied by American Speed mated to either a Porsche or Getrag transaxle was the factory recommended standard, and this configuration was fitted to all turnkey cars. Performance Ultima focused their marketing efforts on record-breaking activities using a model equipped with a American Speed engine, called the Ultima GTR640, and subsequently, a at 6700 rpm and a maximum torque of at 4400 rpm Chevy V8 engine called the GTR 720. As a result, they established the following official, independently verified records for a production car equipped with road tyres and exhaust: Fastest 0– time: 2.6 seconds Fastest 0– time: 5.3 seconds Fastest – time: 1.8 seconds Fastest to 0 mph braking: 3.6 seconds Fastest 0 – – 0 mph time: 9.4 seconds Best performance on a skidpad: 1.176g lateral grip in a circle. Fastest road car over the 1/4 mile: 9.9 seconds @ Due to its kerb weight of , the power-to-weight ratio for the GTR720 is per tonne, which is a better ratio than the Bugatti Veyron, Enzo Ferrari, Ascari A10, Koenigsegg CCX or CCGT, but less than the Koenigsegg CCXR or the Caparo T1. However, the Ultima chassis is rated for engines up to and some of Ultima's customers, notably Jeff Schwartz, have fitted engines producing or more, for a power-to-weight ratio of over per tonne, which is approximately twice the power-to-weight ratio of the aforementioned cars and nearly the same as the Caparo T1's ( per tonne, but this is a "dry" tonnage and the bhp PS kW/tonne would be reduced once oil, coolant, gasoline, etc. are added, compared to the Ultima figures above which are "wet" weights). There are also other model designations for the kits, including the GTR 660 and GTR 730. The GTR720 was independently timed lapping the Top Gear test track in 1