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Riley 1½-Litre RM

(1953 model)

Brief specs of 1953 Riley 1½-Litre RM

4-door 5-seater sedan (saloon), petrol (gasoline) 4-cylinder 8-valve straight (inline) engine, OHV (overhead valve, I-head), 1496 cm3 / 91.3 cu in / 91.3 cu in, 41.0 kW / 55.0 hp / 55.0 hp @ 4500 rpm / 4500 rpm / 4500 rpm, 106.0 N·m / 78.2 lb·ft / 78.2 lb·ft @ 2500 rpm / 2500 rpm / 2500 rpm, manual 4-speed transmission, rear wheel drive, 120 km/h / 75 mph / 75 mph top speed

units: metric UK US

Basic (general) data

Marque (make)RileyIssued from1953
Model1½-Litre RMIssued until
Serie1.5-LitreNumber made
Model familyBody construction
Model codeBody designation
ManufacturerRileyCountryUK

Bodywork

Base platformNumber of doors4
Bodywork typesedan (saloon)Number of seats5
Bodywork designerCargo capacity (volume)
Passenger space (volume)Max. cargo capacity (volume)

Dimensions & Weight

Length4547 mm / 179.0 in / 179.0 inTotal (curb) weight1320 kg / 2910 lb / 2910 lb
Width1613 mm / 63.5 in / 63.5 inDry weight
Height1500 mm / 59.1 in / 59.1 inLoad capacity
Wheelbase2858 mm / 112.5 in / 112.5 inGross (max.) weight
Track front1327 mm / 52.2 in / 52.2 inTowing weight
Track rear1327 mm / 52.2 in / 52.2 inWeight distribution (front)50.5 % / 50.5 % / 50.5 %
Ground clearance191 mm / 7.5 in / 7.5 inFuel capacity57 l / 12.5 UK gal / 15.0 US gal
Length/wheelbase ratio1.59  

Aerodynamics

Drag coefficient (Cd, Cx, Cw)Frontal area (A)1.94 m2 / 20.9 sq ft / 20.9 sq ft
Aerodynamic coefficient (Cd×A)Aerodynamic resistance (Aero horse power) at 100 km/h (62 mph)

Engine

Engine CodeTotal number of cylinders4
Engine Typestraight (inline) Total number of valves8
Engine ManufacturerValves per cylinder2
Engine constructionBore69.0 mm / 2.72 in / 2.72 in
Fuelpetrol (gasoline)Stroke100.0 mm / 3.94 in / 3.94 in
Fuel detailsBore/Stroke ratio0.69
Fuel supply1 SU carbEngine displacement1496 cm3 / 91.3 cu in / 91.3 cu in
Engine Main bearingsUnitary capacity374.00 cm3/cylinder / 22.823 cu in/cylinder / 22.823 cu in/cylinder
Cam DesignOHV (overhead valve, I-head)Compression ratio6.8 : 1
SumpMax. output power41.0 kW / 55.0 hp / 55.0 hp at 4500 rpm / 4500 rpm / 4500 rpm
AspirationnaturalMax. torque106.0 N·m / 78.2 lb·ft / 78.2 lb·ft at 2500 rpm / 2500 rpm / 2500 rpm
Compressor typeN/AMaximum rpm
IntercoolernoMax. net output (power at the wheels)24.1 kW / 32.4 hp / 32.4 hp (est.)
CoolantwaterSpecific output27.4 kW/l / 0.602 bhp/cu in / 0.602 bhp/cu in
Catalytic converternoSpecific torque70.9 N·m/l / 0.62 lb·ft/cu in / 0.62 lb·ft/cu in

Transmission

Transmission typemanualNumber of gears4
Wheel driverear wheel driveTop gear (drive) ratio1
  Final gear (drive) ratio5.13

Performance

Acceleration 0-50 mph (80 km/h)15.90 s / 15.90 s / 15.90 sTop (maximal) speed120 km/h / 75 mph / 75 mph
Acceleration 0-60 mph (97 km/h)25.10 s / 25.10 s / 25.10 sPower-to-weight ratio41.7 kW/ton / 31.6 bhp/ton / 31.6 bhp/ton
Acceleration 0-100 km/hFuel consumption, City (urban)
Acceleration 0-100 mph (160 km/h)Fuel consumption, Road (extra-urban)
Acceleration 80-120 km/h (50-70 mph) in topFuel consumption, Mixed (combined)
Standing ¼mile time Fuel consumption, Euro
Standing kilometer time CO2 emissions
  Range

Chassis

Engine locationfrontEngine alignmentlongitudinal
SteeringSteering details
Turns lock-to-lockTurning circle9.1 m / 29.9 ft / 29.9 ft
Suspension frontIndependent, Wishbone (A-arm, control arm), Torsion barSuspension rearLive axle, Semi-elliptic leaf springs
Wheels frontWheels rear
Tyres frontTyres rear
Brakes frontdrumBrakes reardrum
Brake diameter frontBrake diameter rear
Brakes detailsBraked area

Technical specifications and performance data of Riley 1½-Litre RM

Infobox

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