The Riley 1½-Litre RM is a rear wheel drive vehicle, with its engine placed in the front, and a 4 door saloon bodyshell.
The 1.5 litre engine is a naturally aspirated, overhead valve, 4 cylinder that has an output of 55 bhp (56 PS/41 kW) of power at 4500 rpm, and maximum torque of 106 N·m (78 lb·ft/10.8 kgm) at 2500 rpm.
The engine transfers its power through to the wheels by means of a 4 speed manual transmission.
Quoted weight at the kerb is 1320 kg.
Maximum quoted speed is 120 km/h or 75 mph.
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 | 2858 mm | 112.5 inches | |
| Track/tread (front) | 1327 mm | 52.2 inches | |
| Track/tread (rear) | 1327 mm | 52.2 inches | |
| Length | 4547 mm | 179 inches | |
| Width | 1613 mm | 63.5 inches | |
| Height | 1500 mm | 59.1 inches | |
| Ground clearance | 191 mm | 7.5 inches | |
| length:wheelbase ratio | 1.59 | ||
| Kerb weight | 1320 kg | 2910 lb | |
| Weight distribution | 50.5% front | ||
| fuel tank capacity | 56.8 litres | 12.5 [15] UK [US] gal. | |
| aerodynamics | |||
| Drag coefficient | |||
| Frontal area | 1.94 m² | ||
| CdA | |||
| Powertrain | |||
| engine type | naturally aspirated petrol | ||
| Engine manufacturer | |||
| Engine code | |||
| Cylinders | Straight 4 | ||
| Capacity | 1.5 litre 1496 cc (91.292 cu in) |
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| Bore × Stroke | 69 × 100 mm
2.72 × 3.94 in |
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| Bore/stroke ratio | 0.69 | ||
| Valve gear | overhead valve (OHV)
2 valves per cylinder 8 valves in total |
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| maximum power output | 56 PS (55 bhp) (41 kW) at 4500 rpm |
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| maximum torque | 106 Nm (78 ft·lb) (10.8 kgm) at 2500 rpm |
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| Specific output | 27.4 kW/litre 37.3 ps/litre 36.8 bhp/litre 0.6 bhp/cu in |
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| Specific torque |
70.86 Nm/litre
0.86 ft·lb/cu3 |
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| Engine construction | |||
| Lubrication | |||
| compression ratio | 6.8:1 | ||
| Fuel system | 1 SU carb | ||
| bmep (brake mean effective pressure) | 890.4 kPa (129.1 psi) | ||
| Maximum RPM | |||
| crankshaft bearings | |||
| Engine coolant | Water | ||
| Unitary capacity | 374 cc | ||
| Aspiration | Normal | ||
| Compressor | N/A | ||
| Intercooler | None | ||
| Catalytic converter | N | ||
| performance | |||
| Acceleration 0-80km/h (50mph) | 15.9 s | ||
| Acceleration 0-60mph | 25.1 s | ||
| Acceleration 0-100km/h | |||
| Acceleration 0-160km/h (100mph) | |||
| Standing quarter-mile | 22.8 s | ||
| Standing kilometre | |||
| Maximum speed | 120 km/h (75 mph) | ||
| Power-to-weight ratio | Higher is better 42.25 PS/tonne (1000 kg) 0.04 PS/kg 31.07 kW/tonne (1000 kg) 0.03 kW/kg 41.67 bhp/tonne (1000 kg) 0.04 bhp/kg 0.02 bhp/lb |
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| Weight-to-power ratio | Lower is better 32.18 kg/kW 53.76 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 | 9.10 m | ||
| Front suspension | I.W.TB. | ||
| Rear suspension | LA.SE. | ||
| Wheel size front | |||
| Wheel size rear | |||
| Tyres front | |||
| Tyres rear | |||
| Brakes F/R | Dr/Dr | ||
| Front brake diameter | |||
| Rear brake diameter | |||
| Braked area | 816 cm2 | ||
| Gearbox | 4 speed manual | ||
| Top gear ratio | 1 | ||
| Final drive ratio | 5.13 | ||
| general | |||
| Carfolio.com ID | 48906 | ||
| Production total | |||
| Model code | |||
| RAC rating | 11.8 | ||
| Insurance classification | No information available | ||
| Tax band | No information available | ||
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1953 Riley 1½-Litre RM added before December 1995. Last modified 2013-02-28. |
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