HDT Brock Commodore VL Technical Specifications

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HDT VL Brock Commodore
Holden Colour Codes A - L
Holden Colour Codes A - L
Holden Colour Codes M -Z
Holden Colour Codes M -Z

Brock's first VL models were based on the Calais, an obvious indication that the vehicles were now very much in the up-market muscle car sector. Both sedan and wagon versions were available, and the initial Calais LE model was powered by the 3.0 litre Nissan straight six, but as the Nissan Turbo and V8 engines became available it was only natural they would find their way under the HDT bonnets.

For a time the turbo six was more popular than the V8, the latter had been set up to provide bag-loads of torque, but many simply wanted the power and had seemingly forgotten how tractable the V8's were. Improvements were made to the V8's and soon they would regain the mantle as the "motor" of choice, although Peter Brock continued to refer to them as 4.9 litre long after Holden had switched to calling them simply a 5.0 litre.

  • Years of Manufacture: 1986 - 1987
  • Number Built:
    • SS Group A: 500
    • Other HDT specials - numbers unknown
  • Models:
    • HDT SS Group A
    • HDT SS Group Three
    • Corsa
    • Calais LE
    • Calais Director
    • Bathurst
    • Bathurst Aero
  • Date(s) of Introduction:
    • SS Group A: November, 1986
    • Calais Director: February, 1987
    • SS Group Three: Mid 1987
  • To Identify:
    • SS Group A: A new slim slotted style grille panel, bonet bulge, NACA style inlet duct, larger rear spoiler, front air dam with three huge air inlets but no side or rear skirts in standard form, distinctive Momo five spoke alloy wheels fitted, available in red only
    • SS Group Three: Slotted grille panel, no bonnet bulge, rear spoiler, front air dam with three air inlets, side skirts and rear skirt, reverted to HDT styled alloy wheels, available in white only
    • Calais LE: Based on Calais with front air dam extending from standard bumper, letter box grille, 15" HDT alloy wheels, side skirts, rear bumper extension, lip spoiler
    • Calais Director: Peri integration body styling, side skirts, front spoiler with driving lights, rear turned-up spoiler, fender flares, rear underbody adjustable wing, roof spoiler with safety brake lamp, HDT/Momo 16" alloy wheels
    • Bathurst: Group Three spoiler, side skirts, wheels, Group A grille and rear spoiler
    • Bathurst Aero: Calais Director body kit without fender flares, LE spoiler and Group Three wheels
  • Body:
    • Unitary construction (Monocoque)
  • Exterior Dimensions:
    • Total Length: 4766mm
    • Total Width: 1722mm
    • Total Height at kerb weight: 1367mm
    • Wheelbase: 2668mm
    • Front Track: 1451mm
    • Rear Track: 1433mm
    • Kerb Weight: 1295kg (SS Group A)
  • Turning Circle:
    • 10.7 metres
  • Fuel Tank Capacity: 63 litres
  • Instruments:
    • Instrument cluster from Berlina
    • Addition of Tachometer, Momo leather-bound steering wheel, Momo leather gear shift knob (on manual models)
  • SS Group A:
    • Capacity: 4.987 litre
    • Type: Conventional, watercooled four stroke, reciprocating piston type with 8 cylinders
    • Configuration: Front mounted, longitudinal, Vee configuration
    • Head: Pushrod and rocker actuated ohv with two valves per cylinder
    • Fuel System: Rochester Quadrajet 4 barrel downdraft type carburettor
    • Bore and Stroke: 101.6 x 76.8mm
    • Power: 137kw at 4400rpm
    • Torque: 345Nm at 3200rpm
    • Compression Ratio: 8.5:1
  • SS Group Three:
    • Capacity: 4.987 litre
    • Type: Conventional, watercooled four stroke, reciprocating piston type with 8 cylinders
    • Configuration: Front mounted, longitudinal, Vee configuration
    • Head: Pushrod and rocker actuated ohv with two valves per cylinder
    • Fuel System: Rochester Quadrajet 4 barrel downdraft type carburettor
    • Bore and Stroke: 101.6 x 76.8mm
    • Power: 187kw at 4700rpm
    • Torque: 415Nm at 3600rpm
    • Compression Ratio: 9.2:1
  • Director 'Stroker':
    • Capacity: 5.643 litre
    • Type: Conventional, watercooled four stroke, reciprocating piston type with 8 cylinders
    • Configuration: Front mounted, longitudinal, Vee configuration
    • Head: Pushrod and rocker actuated ohv with two valves per cylinder
    • Fuel System: Rochester Quadrajet 4 barrel downdraft type carburettor
    • Bore and Stroke: 102.4. x 85.7mm
    • Power: 231kw at 5400rpm
    • Torque: 536Nm at 3200rpm
    • Compression Ratio: 9.2:1
  • Ignition and Electrical:
    • 12 volt negative ground
    • Breakerless high energy electronic ignition
  • Exhaust:
    • New exhaust system incorporating catalytic converter
  • 5 speed Borg-Warner T-5 Manual Transmission:
    • 1st: 3.25:1
    • 2nd: 1.99:1
    • 3rd: 1.29:1
    • 4th: 1.00:1
    • 5th: 0.72:1
    • Reverse: 3.15:1
  • 3 speed Automatic Transmission:
    • 1st: 2.31:1
    • 2nd: 1.46:1
    • 3rd: 1.00:1
    • Reverse: 1.85:1
  • Clutch:
    • Single dry plate diaphram spring actuation type
    • Torque converter on Group Three Automatic
  • Rear Axle Ratio: 3.08:1
  • Top Speed in Gears:
    • SS Group A 5 speed manual:
      • 1st: 63 km/h
      • 2nd: 104 km/h
      • 3rd: 160 km/h
      • 4th: 207 km/h
      • 5th: 221 km/h
      • 0-100 km/h: 7.5 seconds
      • Standing Quarter Mile (400 metres): 15.5 seconds
    • SS Group Three 5 speed manual:
      • 1st: 64 km/h
      • 2nd: 104 km/h
      • 3rd: 161 km/h
      • 4th: 207 km/h
      • 5th: 221 km/h
      • 0-100 km/h: 7.6 seconds
      • Standing Quarter Mile (400 metres): 15.2 seconds
    • Director 'Stroker' 5.6 litre 5 speed manual:
      • 1st: 66 km/h
      • 2nd: 107 km/h
      • 3rd: 165 km/h
      • 4th: 210 km/h
      • 5th: 227 km/h
      • 0-100 km/h: 7.0 seconds
      • Standing Quarter Mile (400 metres): 15.1 seconds
  • Suspension:
    • Front: Fully independent, MacPherson struts with coil springs and anti-roll bar, Bilstein dampers
    • Rear: Live axle located by trailing arms and Panhard rod. Coil springs and anti-roll bar; Bilstein dampers, Opel semi-trailing arm IRS standard on Calais Director, optional on other models
  • Steering:
    • Power assisted rack and pinion, ratio 15.8:1
    • Turns lock-to-lock: 2.7
  • Brakes:
    • Split circuit system with power booster
    • Front: 289mm vented discs
    • Rear: 230mm discs
  • Wheels:
    • SS Group A: 7.0 inch x 16.0 inch HDT Momo 5 spoke Alloys
    • SS Group Three: 7.0 x 16 inch HDT alloys
    • Calais LE: 7.0 x 15 inch HDT alloy with option of 7.0 x 16 inch HDT Momo
    • Calais Director: 8.0 inch x 16.0 inch HDT Momo 5 spoke Alloys
  • Tyres:
    • SS Group A: Bridgestone RE71 205/55 VR15
    • SS Group Three: Bridgestone RE71 225/50 VR16
    • Calais LE: 215/60 VR12 with optional 225/50 VR16
    • Calais Director: Bridgestone RE71 245/45 VR16


Also see:
HDT Brock Group 3 Signature Series Brochure

Latest Classic Car Classifieds

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