1961 Riley 4/72

The Riley 4/72 is a saloon (sedan) with 4 doors and a front mounted powerplant which delivers its power through the rear wheels. The Riley 4/72's engine is a naturally aspirated petrol, 1.6 litre, overhead valve 4 cylinder with 2 valves per cylinder. It produces 68 bhp (69 PS/51 kW) of power at 5000 rpm, and maximum torque of 120 N·m (89 lb·ft/12.2 kgm) at 2500 rpm. A 4 speed manual gearbox transfers the power to the wheels. Claimed kerb weight is 1148 kg. Its maximum speed claimed is 131 km/h or 81 mph.
Full specs

Body type
4 door sedan/saloon with 4/5 seats
Length
4534 mm
Weight
1148 kg
Engine type
naturally aspirated petrol
Engine size
1.6 litre
Cylinders
4, Straight
Power
69 PS / 68 bhp / 51 kW @ 5000 rpm
Torque
120 Nm / 89 ft.lb / 12.2 kgm @ 2500 rpm
Top speed
131 km/h / 81 mph

1961 Riley 4/72 specifications

1961 Riley 4/72 data
bodywork
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Body type	4/5 seater sedan/saloon
Number of doors	4
Designer
dimensions & weights
Wheelbase	2546 mm	100.2 inches
Track/tread (front)	1283 mm	50.5 inches
Track/tread (rear)	1308 mm	51.5 inches
Length	4534 mm	178.5 inches
Width	1613 mm	63.5 inches
Height	1499 mm	59 inches
Ground clearance	165 mm	6.5 inches
length:wheelbase ratio	1.78
Kerb weight	1148 kg	2531 lb
Weight distribution
fuel tank capacity	45.5 litres	10 [12] UK [US] gal.
aerodynamics
Drag coefficient
Frontal area
CdA
Powertrain
engine type	naturally aspirated petrol
Engine manufacturer	BMC
Engine code
Cylinders	Straight 4
Capacity	1.6 litre 1622 cc (98.981 cu in)
Bore × Stroke	76.2 × 88.9 mm 3 × 3.5 in
Bore/stroke ratio	0.86
Valve gear	overhead valve (OHV) 2 valves per cylinder 8 valves in total
maximum power output (Net)	69 PS (68 bhp) (51 kW) at 5000 rpm
maximum torque (Net)	120 Nm (89 ft·lb) (12.2 kgm) at 2500 rpm
Specific output (Net)	31.3 kW/litre 42.5 ps/litre 41.9 bhp/litre 0.69 bhp/cu in
Specific torque (Net)	73.98 Nm/litre 0.89 ft·lb/cu³
Engine construction
Lubrication
compression ratio	8.3:1
Fuel system	2 SU carbs
bmep (brake mean effective pressure)	929.7 kPa (134.8 psi)
Maximum RPM
crankshaft bearings
Engine coolant	Water
Unitary capacity	405.5 cc
Aspiration	Normal
Compressor	N/A
Intercooler	None
Catalytic converter	N
performance
Acceleration 0-80km/h (50mph)	13.5 s
Acceleration 0-60mph
Acceleration 0-100km/h
Acceleration 0-160km/h (100mph)
Standing quarter-mile	22.1 s
Standing kilometre
Maximum speed	131 km/h (81 mph)
Power-to-weight ratio	Higher is better 60.06 PS/tonne (1000 kg) 0.06 PS/kg 44.17 kW/tonne (1000 kg) 0.04 kW/kg 59.23 bhp/tonne (1000 kg) 0.06 bhp/kg 0.03 bhp/lb
Weight-to-power ratio	Lower is better 22.64 kg/kW 37.82 lb/bhp
fuel consumption
Fuel consumption
universal fuel consumption (calculated from the above)
litres/100km
km/litre
UK MPG
US MPG
Carbon dioxide emissions
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.SE.
Wheel size front
Wheel size rear
Tyres front
Tyres rear
Brakes F/R
Front brake diameter
Rear brake diameter
Braked area
Gearbox	4 speed manual
Top gear ratio	1
Final drive ratio	4.30
general
Carfolio.com ID	48961
Production total
Model code
RAC rating	14.4
Insurance classification	No information available
Tax band	No information available
1961 Riley 4/72 added before December 1995. Last modified 2017-09-17.