TWR Ultima GTR




This is the first Ultima ‘GTR’ (T81GJF) as seen on and on the GTR sales brochure.  The car was factory built by Ultima Sports Ltd in 1999, used as a prototype for the new GTR model range, tested at MIRA and featured as the factory GTR demonstrator.

This car also featured in Which Kit magazines (May & November 1999) EVO magazine Le Mans trip (March 2000) and was test driven by Tiff Needell on BBC’s Top Gear in 2000 click GTR TV!

I purchased this rather special car in April 2007 and immediately drove it home circa 300 miles directly after buying it (with only 7,600mls on the clock).  Even though I took it easy (honest), it was fantastic to drive!  I would love to have built one myself, but business and family commitments prevented that, so I went for this very first rather special factory built example, with some very interesting history.

Currently running a 6.7ltr full race/dry sump spec Small Block Chevy, de-tuned via slightly milder cam to just 487bhp & 487lb/ft torque (on dyno) for reliability and drivability now with a smooth wide power band.

I am planning is to run the car in MSA Sprints, Speed events and obviously a few track days whilst enjoying the odd run out on the road in the meantime!





Rear Wing:













Engine (de-tuned) Spec:



































Fuel System:












Power to Weight Ratio:

Full spaceframe using mainly 38mm x 1.5mm dia tube MIG welded.  Panelled in 1.5mm NS5 alloy sheet.

GRP finished in blue metallic gel coat and front splitter.

Double element track design in Carbon Fibre.

Ultima leather seats, 5 point harnesses and white instruments.

Ultima triple headlight system.

Laminated glass, full USA/Euro certified.

TIG welded double unequal length wishbones with Nylatron joints.

LM25 Alloy big bearing uprights.

Fully adjustable coil spring dampers.

Front and rear Anti-Roll bars.

Alloy sports rack and pinion 2.4 turns lock to lock.

Alcon 12.7” curved vane vented disc brakes all round with four pot callipers and mechanical handbrake.

Adjustable brake bias front to rear.

All stainless steel TUV hoses.

6700CC (409ci) SBC Bowtie 400 block - 4.165” bore.

All steel Eagle Crank/Rods - 3.75” stroke.

JE Forged Pistons.

ARP Studs throughout.

CompCams 242/248 Roller Cam (replaced 260/269)

Dart 65cc Alloy Cylinder Heads (built/ported by Peter Knight Race Engines).

Alloy Roller Rockers (Valve Lash – 17 thou hot).

Rocker Stud Girdle Bracing Kit.

Dry Sump system with Oil Cooler.

Chuck Nyutton built 750CFM Holley.

K&N Bin Lid Air Filter.

Ignition Timing – 37 BTDC (MSD Ignition).

Power - 487bhp @ 5800rpm & 487lb/ft torque @ 4900rpm (on dyno).


Porsche G50/50 five speed transaxle.

Heavy duty race spec.

Twin 7.5 Gallon foam filled fuel tanks, twin electric pumps.

Race 1 7/8” x 28” ceramic coated manifolds with race silencers.

Ultima 9” x 18” front, 13.5” x 18” rear alloy three piece with five stud centres machined from billet alloy.

Pirelli P Zero’s 235/35/ZR18 front, 335/30ZR18 rear.

Factory Air Conditioning (removed).

Length                                     4000mm (4010mm/13’1 7/8” with Splitter)

Width                                       1850mm (6’ 1”)

Height                                      1050mm (3’5 3/8”)

Wheelbase                              2560mm (8’4 Ύ”)

Ground Clearance                  120mm (4 Ύ”)

Weight (SBC V8 Iron Block)   925Kg (20391lb 4.41oz)






Use the menu on your left to find out much more about our car, what development and modifications we’ve done for use on track (eventually), events we’ve attended and participated in and some of the fun we’ve had along the way.



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