The GDMk4 body shape is externally accurate to the original displaying an uncompromisingly muscular stance. Compared to the Mk3, the Mk4 sits higher with a deeper cockpit and scuttle sides and larger wheel arches, there are other subtle differences more noticeable when viewed side by side. The GDMk4 uses the same chassis options as the Mk3 and therefore the same famed handling characteristics.Depending on the final detail fitments the GD Mk4 can be every bit the classic 60s icon or take on a more contemporary appearance. The GDMk4 is available as a factory built car ready to drive away, or supplied in component form for self assembly. Prices are available to suit most budgets. All factory cars are built to order to individual customer preferences. For self build projects a full breakdown component pricelist is available on request.



Request a brochure: GD Mk4 PDF Brochure

Chassis: Tubular backbone

Developed for road and track use, the backbone design cloaks the power train and accurately locates the suspension for excellent power delivery with positive and precise control. Designed for huge V8 power the chassis always feel taught and responsive when pushed to the limit.


Body Shell: GRP Semi-Monocoque

Quite unlike conventional body shells the GD body shell is a one-piece rigid semi-monocoque (tub) design with double skin mouldings. A composite construction made of glass fibre reinforced plastic with critical areas strengthened with advanced woven glass materials. The tub rigidity is enhanced with front and rear bulkheads, engine bay, foot-wells, transmission tunnel and all inner mouldings as an integral part of the structure. Further occupancy protection is gained by injecting energy absorbing polyurethane foam into the body sides and the use of sliding anti-intrusion beams within the doors. The body tub is insulated from the chassis with anti-vibration mounts adding further comfort and longevity.


Suspension: Double Wishbone

The chassis features independent double wishbone suspension with aircraft grade alloy uprights. Compared to conventional designs the suspension offers lighter unsprung weight and provides better camber control with adjustment for static camber, caster and toe-in settings. The suspension design gives the GD unrivalled levels of road holding and ride quality.


Spring Dampening: Adjustable Coil Over

Alloy bodied shock absorbers are fitted with coil springs rated for intend use. The units are adjustable for damping resistance and ride height changes.


Engine: All alloy GM LS V8

The GM Gen3/4 LS range of V8 engines have been installed in Gardner Douglas cars since 2001. We regard them as the best choice for power/weight with smooth drivability and offer better fuel economy, reliability and lower service costs. Today’s standard fitment is the 6.2Ltr LS3 or optional 7.0Ltr LS7.


Transmission: 5 or 6 speed H Gate

Tremec TKO 600 close ratio 5 speed or T56 and Magnum 6 speed.


Differential: LSD 3.23:1

BTR Hydrotrack speed sensitive limited slip differential provides awesome traction and neutral handling.


Breaks: AP 4-pot Ventilated

Brakes are dual circuit non-servo assisted as standard.


Wheels: 16″ to 18″ 3-piece

Wheels are offered in several sizes to suit preferred aesthetics and driving style. Typically 8.5×18 front and 10×18 rear.


Tyres: Toyo T1R sizes vary

Toyo tyres offer good all round performance with optional track day compounds.


Steering: Rack and pinion 3.25:1

An optional quick rack is available.


Fuel Tank: 50ltr stainless steel

Stainless steel construction. For safety the fuel tank is mounted between the rear axles. The upright design serves to minimize fuel surge.

Unleaded, 28mpg – Typical Touring

Recorded figures for Mk4 with 425bhp LS2.



Wheelbase: 2286mm (90″)
Length: 3940mm (155″)
Width: 1790mm (70″)
Height: 1140mm (45″)


Typically 1000kg kerb

Lighter and stiffer than the original cars makes the Mk4 more agile and far quicker.


From 435bhp

LS3 starts at 435bhp, with tuned options between up to the LS7 with 650bhp – but that’s mental!


0-60 3.8secs, top speed 160mph

Recorded figures for Mk4 with 400bhp LS2.