The Imperial Hardtop is a saloon (sedan) with 4 doors and a front mounted engine which delivers the power to the rear wheels.
The Imperial Hardtop is one of the AY1-M model family from Imperial.
It is powered by a naturally aspirated engine of 6.7 litre capacity. This unit features overhead valve valve gear, a 90 degree V 8 cylinder layout, and 2 valves per cylinder. It develops 340 bhp (345 PS/254 kW) of power at 4600 rpm, and maximum torque of 637 N·m (470 lb·ft/65 kgm) at 2800 rpm.
The engine supplies its power through to the wheels via a 3 speed automatic gearbox.
Stated kerb weight is 2275 kg.
Full specs
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| bodywork | |||
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| Body type | 4/5 seater sedan/saloon | ||
| Number of doors | 4 | ||
| Designer | |||
| dimensions & weights | |||
| Wheelbase | 3277 mm | 129 inches | |
| Track/tread (front) | 1570 mm | 61.8 inches | |
| Track/tread (rear) | 1567 mm | 61.7 inches | |
| Length | 5786 mm | 227.8 inches | |
| Width | 2032 mm | 80 inches | |
| Height | 1453 mm | 57.2 inches | |
| Ground clearance | |||
| length:wheelbase ratio | 1.77 | ||
| Kerb weight | 2275 kg | 5016 lb | |
| Weight distribution | |||
| fuel tank capacity | |||
| aerodynamics | |||
| Drag coefficient | |||
| Frontal area | |||
| CdA | |||
| Powertrain | |||
| engine type | naturally aspirated petrol | ||
| Engine manufacturer | Chrysler | ||
| Engine code | |||
| Cylinders | V 8 in 90° vee | ||
| Capacity | 6.7 litre 6746 cc (411.666 cu in) |
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| Bore × Stroke | 106.17 × 95.25 mm
4.18 × 3.75 in |
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| Bore/stroke ratio | 1.11 | ||
| Valve gear | overhead valve (OHV)
2 valves per cylinder 16 valves in total |
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| maximum power output | 345 PS (340 bhp) (254 kW) at 4600 rpm |
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| maximum torque | 637 Nm (470 ft·lb) (65 kgm) at 2800 rpm |
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| Specific output | 37.6 kW/litre 51.1 ps/litre 50.4 bhp/litre 0.83 bhp/cu in |
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| Specific torque |
94.43 Nm/litre
1.14 ft·lb/cu3 |
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| Engine construction | |||
| Lubrication | |||
| compression ratio | 10:1 | ||
| Fuel system | 1 Carter AFB-3871S carburettor | ||
| bmep (brake mean effective pressure) | 1186.6 kPa (172.1 psi) | ||
| Maximum RPM | |||
| crankshaft bearings | |||
| Engine coolant | Water | ||
| Unitary capacity | 843.25 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 151.53 PS/tonne (1000 kg) 0.15 PS/kg 111.45 kW/tonne (1000 kg) 0.11 kW/kg 149.45 bhp/tonne (1000 kg) 0.15 bhp/kg 0.07 bhp/lb |
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| Weight-to-power ratio | Lower is better 8.97 kg/kW 14.99 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 | 3.500 | ||
| Turning circle | |||
| Front suspension | |||
| Rear suspension | |||
| Wheel size front | |||
| Wheel size rear | |||
| Tyres front | 9.15 x 15 | ||
| Tyres rear | 9.15 x 15 | ||
| Brakes F/R | Dr/Dr-S | ||
| Front brake diameter | |||
| Rear brake diameter | |||
| Braked area | |||
| Gearbox | 3 speed automatic | ||
| Top gear ratio | 1 | ||
| Final drive ratio | 4.90 | ||
| general | |||
| Carfolio.com ID | 255343 | ||
| Production total | |||
| Model code | Y24 | ||
| Model family | AY1-M | ||
| RAC rating | 55.9 | ||
| Insurance classification | No information available | ||
| Tax band | No information available | ||
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1964 Imperial Hardtop (1965) added 2011-09-01. Last modified 2020-02-02. |
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