The Grand Prix 428 is a rear wheel drive coupé passenger car with a front positioned engine, sold by Pontiac.
The power is produced 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 produces 370 bhp (375 PS/276 kW) of power at 4800 rpm, and maximum torque of 640 N·m (472 lb·ft/65.3 kgm) at 3200 rpm.
The engine delivers its power through to the wheels via a 3 speed automatic transmission.
It weighs a quoted 1564 kg at the kerb.
Full specs
|
|
|||
| bodywork | |||
|---|---|---|---|
| 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 | 140 mm | 5.5 inches | |
| 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) |
||
| Bore × Stroke | 104.65 × 101.6 mm
4.12 × 4 in |
||
| Bore/stroke ratio | 1.03 | ||
| Valve gear | overhead valve (OHV)
2 valves per cylinder 16 valves in total |
||
| maximum power output (gross) |
375 PS (370 bhp) (276 kW) at 4800 rpm |
||
| maximum torque (gross) |
640 Nm (472 ft·lb) (65.3 kgm) at 3200 rpm |
||
| Specific output (gross) |
39.5 kW/litre 53.7 ps/litre 52.9 bhp/litre 0.87 bhp/cu in |
||
| Specific torque (gross) |
91.55 Nm/litre
1.11 ft·lb/cu3 |
||
| Engine construction | cast iron block & head | ||
| Lubrication | wet sumped | ||
| compression ratio | 10.5:1 | ||
| Fuel system | 1 Rochester carburettor | ||
| bmep (brake mean effective pressure) | 1150.4 kPa (166.9 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 239.86 PS/tonne (1000 kg) 0.24 PS/kg 176.41 kW/tonne (1000 kg) 0.18 kW/kg 236.57 bhp/tonne (1000 kg) 0.24 bhp/kg 0.11 bhp/lb |
||
| Weight-to-power ratio | Lower is better 5.67 kg/kW 9.47 lb/bhp |
||
| 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 | 14.10 m | ||
| 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 | 3 speed automatic | ||
| Top gear ratio | 1 | ||
| Final drive ratio | 3.23 | ||
| general | |||
| Carfolio.com ID | 67078 | ||
| Production total | |||
| Model code | |||
| RAC rating | 54.3 | ||
| Insurance classification | No information available | ||
| Tax band | No information available | ||
|
1969 Pontiac Grand Prix 428 added before December 1995. Last modified 2013-03-04. |
|||