Privately built, road legal successor of the historic Ford P68 F3L

GTP-13: Vacuum moded Kevlar-honeycomb reinforced GFRP, Epoxy matrix. Sealed cockpit. Total body mass (w/o windows and w/o paint): 24kg (weighted).

P68: Aluminium body made from 0.030" (approx. 0.8mm) thick* Aluminium sheet metal. Unsealed cockpit subjected to rain. Total body mass (w/o windows and w/o paint): approx. 38kg**.

GTP-13: Aluminium and steel sheet metal based monocoque design. Two-piece rear bulkhead allows for easy installation and removal of the drivetrain. TIG-welded, painted and waxed steel members, solid and Cherry-Max riveted aluminium members. Total mass: 91kg (weighted), torsional stiffness: 12kNm/° (FEM-computed with discretized rivet connections, stiffening roof structure influence not considered in computation).

P68: Aluminium and steel sheet metal based monocoque design. Single-piece rear bulkhead requires separation of engine and gearbox for installation and removal of the drivetrain. Oxy-Acetylene welded steel members, Pop riveted Aluminium members. Total mass: ?, torsional stiffness: ? (at a rough estimate a fifth of the GTP-13's torsional stiffness***).

GTP-13: Ford Windsor V8-SB Dart Aluminium block. Dart Pro 1 Aluminium cylinder heads. Displacement: 5957cm³ (364in³), naturally aspirated, petrol fueled. Mechanical power outpout approximately 600hp (note: not measured). External electric coolant pump, temperature controlled. Dry sump oil system, dual filtered, dual oil tanks. Electronically controlled wasted-spark ignition. Electronically controlled port injection fuel system, lambda-control loop, slide throttle arrangement. Dual catalytic converters, dual reflexion-type mufflers.

P68: Ford Cosworth DFV. Dry sump oil system, mechanical port injection fuel system, slide throttle arrangement. Exhaust system w/o catalytic converter and w/o muffler.

GTP-13: Quaife ZFQ five speed (5+1R), synchro mesh.

Cardan shaft shifting mechanism.

P68: Hewland DG300 five-speed gearbox, unsynchronized. Cardan shaft shifting mechanism.

GTP-13: Independent front and rear, rear wheel drive. Infinitely variable stabilizer bars front and rear. Dual adjustable shock absorbers front and rear.

Wheels: Ø15", w=14" rear; Ø15", w=10" front.

P68: Independent front and rear, rear wheel drive.
Wheels: Ø15", w=10-11" rear; Ø15", w=8.5-9" front.

GTP-13: Greatest length: 4.450m

Greatest width: 1.855m

Roof height: 0.960m (37.8") (w. 0.110m ground clearance)

Total mass: 740kg (w. oil, w. coolant, w. 50Ah/1kA battery, w. radiator fans, w. catalytic converters, w. mufflers, w. A/C system, w/o fuel, w/o driver)

P68: Total mass: 1480lbs* ≅ 671kg (The Ford P68 did not possess radiator fans, catalytic converters, nor mufflers, naturally it did not have an A/C system and furthermore had installed narrower tyres and wheels than the GTP-13).