Key facts

Pontiac Grand Prix 428 HO, 1969 MY information summary

What body style?
fixed-head coupé with 4/5 seats
How long?
5340 mm
How heavy?
1564 kg
What size engine?
7 litre, 6991 cm3
How many cylinders?
8, V
How much power?
395 PS / 390 bhp / 291 kW @ 5200 rpm
How much torque?
630 Nm / 465 ft.lb / 64.2 kgm @ 3400 rpm

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1969 Pontiac Grand Prix 428 HO technical specifications

Introduction

Pontiac Grand Prix 428 HO is an automobile that has a 2 door coupé body style with a front positioned engine powering the rear wheels.
It is powered by a naturally aspirated engine of 7 litre capacity. This powerplant features overhead valve valve gear, a 90 degree V 8 cylinder layout, and 2 valves per cylinder. It has an output of 390 bhp (395 PS/291 kW) of power at 5200 rpm, and maximum torque of 630 N·m (465 lb·ft/64.2 kgm) at 3400 rpm.
Power is supplied to the wheels through a 4 speed manual gearbox.
Quoted weight at the kerb is 1564 kg.
1969 Pontiac Grand Prix 428 HO data
Pontiac Grand Prix 428 HO, 1969 MY data
bodywork
Body type4/5 seater fixed-head coupé
Number of doors2
Designer
dimensions & weights
mminches
Wheelbase 2997 118
Track/tread (front) 1575 62
Track/tread (rear) 1524 60
Length 5340 210.2
Width 1923 75.7
Height 1318 51.9
Ground clearance
length:wheelbase ratio 1.78
Kerb weight 1564 kg 3448 lb
Weight distribution
fuel tank capacity 100.4 litres 22.1 UK Gal 26.5 US Gal
aerodynamics
Drag coefficient
Frontal area
CdA
engine
engine type naturally aspirated petrol
Engine manufacturer GM
Engine code
Cylinders V 8 in 90° vee
Capacity 7 litre
6991 cc
(426.617 cu in)
Bore × Stroke 104.65 × 101.6 mm
4.12 × 4 in
Bore/stroke ratio 1.03
overhead valve (OHV)
2 valves per cylinder
16 valves in total
maximum power output 395 PS (390 bhp) (291 kW)
at 5200 rpm
Specific output 55.8 bhp/litre
0.91 bhp/cu in
maximum torque 630 Nm (465 ft·lb) (64.2 kgm)
at 3400 rpm
Specific torque 90.12 Nm/litre
1.09 ft·lb/cu3
Engine construction cast iron block & head
sump wet sumped
compression ratio 10.75:1
Fuel system 1 Rochester carburettor
bmep (brake mean effective pressure) 1132.4 kPa (164.2 psi)
Maximum RPM
crankshaft bearings 5
Engine coolant Water
Unitary capacity 873.88 cc
Aspiration Normal
Compressor N/A
Intercooler None
Catalytic converter N
performance
Acceleration 0-80km/h (50mph)
Acceleration 0-60mph
Acceleration 0-100km/h
Acceleration 0-160km/h (100mph)
Standing quarter-mile
Standing kilometre
Maximum speed
Power-to-weight ratio 252.83 PS/g
185.95 kW/g
249.36 bhp/ton
0.11 bhp/lb
Weight-to-power ratio 5.38 kg/kW
8.98 lb/bhp
fuel consumption
Fuel consumption
universal consumption (calculated from the above)
litres per 100km
km per litre
UK MPG
US MPG
Carbon dioxide emissions
Carfolio Calculated CO2 ?
VED band (UK)
CO2 Effizienz (DE)
chassis
Engine position front
Engine layout longitudinal
Drive wheels rear wheel drive  
Torque split N/A
Steering
turns lock-to-lock
Turning circle
Front suspension I.CS.
Rear suspension LA.CS.
Wheel size front 7 x 14
Wheel size rear 7 x 14
Tyres front G78-14
Tyres rear G78-14
Brakes F/R Di/Dr-S
Front brake diameter 282 mm
Rear brake diameter 241 mm
Gearbox 4 speed manual
Top gear ratio 1.00
Final drive ratio 3.90
general
Carfolio.com ID288178
Production total
Model code
Model family
RAC rating 54.3
Insurance classification No information available
Tax band No information available
1969 Pontiac Grand Prix 428 HO added 2012-10-27.
Last modified 2013-03-04.

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1969 Pontiac Grand Prix 428 HO


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