The Pontiac Bonneville Hardtop 428 is a saloon (sedan) with 4 doors and a front mounted powerplant which transmits the power to the rear wheels.
The Pontiac Bonneville Hardtop 428 is one of the 262 model family from Pontiac.
Power is produced by an overhead valve, 7 litre naturally aspirated 8 cylinder engine, with 2 valves per cylinder that develops power and torque figures of 375 bhp (380 PS/280 kW) at 4800 rpm and 640 N·m (472 lb·ft/65.3 kgm) at 3200 rpm respectively.
This power is transferred to the wheels by means of a 3 speed manual gearbox.
Full specs
|
|
|||
| bodywork | |||
|---|---|---|---|
| Body type | 4/5 seater sedan/saloon | ||
| Number of doors | 4 | ||
| Designer | |||
| dimensions & weights | |||
| Wheelbase | 3150 mm | 124 inches | |
| Track/tread (front) | 1600 mm | 63 inches | |
| Track/tread (rear) | 1626 mm | 64 inches | |
| Length | 5677 mm | 223.5 inches | |
| Width | 2027 mm | 79.8 inches | |
| Height | 1367 mm | 53.8 inches | |
| Ground clearance | |||
| length:wheelbase ratio | 1.8 | ||
| Kerb weight | |||
| Weight distribution | |||
| fuel tank capacity | |||
| aerodynamics | |||
| Drag coefficient | |||
| Frontal area | |||
| CdA | |||
| Powertrain | |||
| engine type | naturally aspirated petrol | ||
| Engine manufacturer | Pontiac | ||
| 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) |
380 PS (375 bhp) (280 kW) at 4800 rpm |
||
| maximum torque (gross) |
640 Nm (472 ft·lb) (65.3 kgm) at 3200 rpm |
||
| Specific output (gross) |
40 kW/litre 54.4 ps/litre 53.6 bhp/litre 0.88 bhp/cu in |
||
| Specific torque (gross) |
91.55 Nm/litre
1.11 ft·lb/cu3 |
||
| Engine construction | |||
| Lubrication | wet sumped | ||
| compression ratio | 10.5:1 | ||
| Fuel system | 1 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 | |||
| Weight-to-power ratio | |||
| 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 | |||
| Rear suspension | |||
| Wheel size front | 6JK x 14 | ||
| Wheel size rear | 6JK x 14 | ||
| Tyres front | 8.55 x 14 | ||
| Tyres rear | 8.55 x 14 | ||
| Brakes F/R | Dr/Dr | ||
| Front brake diameter | 279 mm | ||
| Rear brake diameter | 279 mm | ||
| Braked area | |||
| Gearbox | 3 speed manual | ||
| Top gear ratio | 1 | ||
| Final drive ratio | 3.23 | ||
| general | |||
| Carfolio.com ID | 343816 | ||
| Production total | |||
| Model code | 26239 | ||
| Model family | 262 | ||
| RAC rating | 54.3 | ||
| Insurance classification | No information available | ||
| Tax band | No information available | ||
|
1968 Pontiac Bonneville Hardtop 428 added 2013-07-15. Last modified 2020-06-10. |
|||