# Ultima GTR

The Ultima GTR is a supercar manufactured by Ultima Sports Ltd of Hinckley, Leicestershire, England. 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 640 bhp (649 PS; 477 kW) American Speed engine, called the Ultima GTR640, and subsequently, a 720 bhp (730 PS; 537 kW) at 6700 rpm and a maximum torque of 855 N⋅m (631 lb⋅ft; 87 kg⋅m) 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 0–60 mph (97 km/h) time: 2.6 seconds
* Fastest 0–100 mph (160 km/h) time: 5.3 seconds
* Fastest 30 mph (48 km/h)–70 mph (110 km/h) time: 1.8 seconds
* Fastest 100 mph (160 km/h) to 0 mph braking: 3.6 seconds
* Fastest 0 – 100 mph (160 km/h) – 0 mph time: 9.4 seconds
* Best performance on a skidpad: 1.176g lateral grip in a 200 ft (60 m) circle.
* Fastest road car over the 1/4 mile: 9.9 seconds @ 143 mph (230 km/h)
Due to its kerb weight of 980 kg (2,161 lb), the power-to-weight ratio for the GTR720 is 745 bhp (755 PS; 556 kW) 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 1,000 bhp (1,014 PS; 746 kW) and some of Ultima's customers, notably Jeff Schwartz, have fitted engines producing 1,000 bhp (1,014 PS; 746 kW) or more, for a power-to-weight ratio of over 1,000 bhp (1,014 PS; 746 kW) per tonne, which is approximately twice the power-to-weight ratio of the aforementioned cars and nearly the same as the Caparo T1's (1,170 bhp (1,186 PS; 872 kW) 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.
In 2007, the GTR720 was independently timed lapping the Top Gear test track in 1 minute 12.8 seconds, at least one second faster than all other times listed on the Top Gear television programme's Power Board at the time. In October 2009 Ultima set another time of 1 minute 9.9 seconds, but this time in a configuration not suitable for use on public highways. Ultima have been keen to point out that this time is faster than those set by both the Ferrari FXX and the Caparo T1; of which neither were deemed to be acceptable road cars by the Top Gear presenters shortly after these times were set.
In 2011, Romanian workshop Black Falcon Cars mated an Ultima GTR chassis and a modified Porsche GT3 transmission with a Chevrolet V8 turbocharged by Nelson Racing Engines to achieve 1,716 bhp (1,280 kW) on racing fuel and made it fully road legal under the brand name Black Falcon SBC-TT1750.
In 2015 the GTR and Can-Am names were retired and replaced by the Ultima Evolution range, which represents a complete reengineering of the package.

## Trims by Power Output

Standard Production Options :
| Trim Name | Displacement | Engine | Horsepower | Torque | Weight |
| GTR (Road Car) | 5,663 cc (345.6 cu in) | LS1 | 345 brake horsepower (350 PS; 257 kW) @ 5,600 rpm | 475 newton-metres (350 lb⋅ft) @ 4,400 rpm | 1,050 kg (2,315 lb) |
| GTR 500 | 6,997 cc (427.0 cu in) | LS7 | 556 brake horsepower (564 PS; 415 kW) | 480 newton-metres (350 lb⋅ft) | 1,023 kg (2,255 lb) |
| GTR 535 | 5,663 cc (345.6 cu in) | LS7 | 535 brake horsepower (542 PS; 399 kW) | 716 newton-metres (528 lb⋅ft) | 992 kg (2,187 lb) |
| GTR 640 | 6,300 cc (384.4 cu in) | American Speed Tuned Chevrolet V8 | 640 brake horsepower (650 PS; 480 kW) | 786 newton-metres (580 lb⋅ft) | 991 kg (2,185 lb) |
| GTR 720 | 6,366 cc (388.5 cu in) | American Speed Tuned Chevrolet V8 | 710 brake horsepower (720 PS; 530 kW) @ 6,700 rpm | 580 newton-metres (430 lb⋅ft) @ 4,400 rpm | 1,050 kg (2,315 lb) |
| Non Standard Production Options ||||||
| Ultima GTR powered by Mercury Marine (2009 SEMA Exhibition) | 9,351 cc (570.6 cu in) | Mercury Marine V8 Twin Turbo | 1,650 brake horsepower (1,670 PS; 1,230 kW) @ 4,000 rpm | 2,226 newton-metres (1,642 lb⋅ft) @ 2,750 rpm | 980 kg (2,161 lb) |
| GTR LS3 | 6,162 cc (376.0 cu in) | LS3 | 480 brake horsepower (490 PS; 360 kW) | 610 newton-metres (450 lb⋅ft) | 930 kg (2,050 lb) |
| GTR V10 | 4,999 cc (305.1 cu in) | S85 | 515 brake horsepower (522 PS; 384 kW) | 600 newton-metres (440 lb⋅ft) | 950 kg (2,094 lb) |
| GTR (Race Car) | 5,663 cc (345.6 cu in) | LS1 | 438 brake horsepower (444 PS; 327 kW) | 602 N⋅m (444 lb⋅ft) @ 4,400 rpm | 839.89 kg (1,852 lb) |
| Falcon SBC-TT1750 (Modified) | 6,997 cc (427.0 cu in) | Nelson Racing LS7 Twin Turbo | 1,716 brake horsepower (1,740 PS; 1,280 kW) @ 5,650 | 1,560 newton-metres (1,150 lb⋅ft) @ 5,000 | 1,221 kg (2,692 lb) |