Our current Aston Martin Vantage GT4 hillclimb car has been constructed over the last three years, starting with a Prodrive prepared chassis complete with FIA approved rollcage, and built with the precept of keeping everything as light as possible by using carbon fibre composites and utilising aluminium in place of steel components where possibl;e without causing detriment to safety or reliability.
This new car supersedes the Red Prodrive GT4 car that we have driven for the past 4 years. It has been in the build process and worked on by both drivers for the last 3 years. It is also based on a 2016 Prodrive GT4 VH (verticle/horizontal) platform of bonded and riveted aluminium sections and castings to create a very rigid and strong chassis.
Built from the ground up,and engineered specifically with speed hillclimbing in mind, a great deal of time and effort has been spent on reducing the weight of the car. This has been achieved by replacing the standard doors, bonnet and rear hatch with carbon fibre panels, as well as many of the incidental components. A lot of heavy or steel components and brackets hace been replaced or re-machined from aluminium or lighweight materials. To give you some idea of the weight saving, the Prodrive GT4 car was specified as 300 kgs lighter than the road car. This car is 100kgs lighter again.
Engine: Aston Martin N24 4300cc V8
Engine Management: Motec M150 ECU with Launch and Traction Control, complete with C125 Dash Manager and Data Logging
Power: Adequate – Our experience shows that exceptionally high HP and torque figures can be obtained, but are dependant on the choice of Rolling Road Dyno coupled with the amount of money you wish to spend!
Clutch: Twin Plate cera-metallic with lightweight flywheel.
Transmission: 6 Speed rear mounted gearbox/transaxle with central mounted sequential shift with Hewland straight cut gears. For 2021 this system has been modified to a pneumatically operated paddle shift.
Exhaust: Silenced Stainless Steel system with race spec catalyctic converters and manufactured by RS Fabrications.
Suspension: Double wishbone spherical bearing suspension front and rear suspension and adjustable for toe, caster and camber. 2 way adjustable Bilstein dampers with coil springs
Brakes: Brembo Front – 380mm diam ventilated steel rotors with 6 pot calipers. Rear – 330mm diam ventilated steel rotors with 4 pot calipers – Pagid brake pads
ABS: Bosch M4 driver adjustable motorsport system
Safety: Prodrive FIA approved 10 mounting point roll cage. Carbon drivers seat fitted with Schroth Racing six point safety harness
Wheels: Magnesium 5-stud GT4 Wheels – 10×18″ Front and 11×18″ Rear
Tyres: Avon Hillclimb slicks and Michelin Wet weather tyres
Aero Devices: Increased protrusion Carbon front splitter with front dive planes, rear diffuser and rear hatch mounted adjustable wing.