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.
Full specs
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| bodywork | |||
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| Body type | 4/5 seater fixed-head coupé | ||
| Number of doors | 2 | ||
| Designer | |||
| dimensions & weights | |||
| Wheelbase | 2997 mm | 118 inches | |
| Track/tread (front) | 1575 mm | 62 inches | |
| Track/tread (rear) | 1524 mm | 60 inches | |
| Length | 5340 mm | 210.2 inches | |
| Width | 1923 mm | 75.7 inches | |
| Height | 1318 mm | 51.9 inches | |
| Ground clearance | |||
| length:wheelbase ratio | 1.78 | ||
| Kerb weight | 1564 kg | 3448 lb | |
| Weight distribution | |||
| fuel tank capacity | 100.4 litres | 22.1 [26.5] UK [US] gal. | |
| aerodynamics | |||
| Drag coefficient | |||
| Frontal area | |||
| CdA | |||
| Powertrain | |||
| 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) |
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| Bore × Stroke | 104.65 × 101.6 mm
4.12 × 4 in |
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| Bore/stroke ratio | 1.03 | ||
| Valve gear | overhead valve (OHV)
2 valves per cylinder 16 valves in total |
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| maximum power output | 395 PS (390 bhp) (291 kW) at 5200 rpm |
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| maximum torque | 630 Nm (465 ft·lb) (64.2 kgm) at 3400 rpm |
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| Specific output | 41.6 kW/litre 56.6 ps/litre 55.8 bhp/litre 0.91 bhp/cu in |
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| Specific torque |
90.12 Nm/litre
1.09 ft·lb/cu3 |
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| Engine construction | cast iron block & head | ||
| Lubrication | 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 | Higher is better 252.83 PS/tonne (1000 kg) 0.25 PS/kg 185.95 kW/tonne (1000 kg) 0.19 kW/kg 249.36 bhp/tonne (1000 kg) 0.25 bhp/kg 0.11 bhp/lb |
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| Weight-to-power ratio | Lower is better 5.38 kg/kW 8.98 lb/bhp |
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| fuel consumption | |||
| Fuel consumption | |||
| universal fuel consumption (calculated from the above) | |||
| litres/100km | |||
| km/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 | ||
| Braked area | |||
| Gearbox | 4 speed manual | ||
| Top gear ratio | 1 | ||
| Final drive ratio | 3.90 | ||
| general | |||
| Carfolio.com ID | 288178 | ||
| Production total | |||
| Model code | |||
| RAC rating | 54.3 | ||
| Insurance classification | No information available | ||
| Tax band | No information available | ||
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1969 Pontiac Grand Prix 428 HO added 2012-10-27. Last modified 2020-02-02. |
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