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1951 Buick Roadmaster Series 70
Riverside
Standard Specifications
  Show Summary  
Original Base Price
No. Produced 809
Body Maker Fisher
No. Doors 2
Passengers 6
Model Number 72MR
Weight
Wheelbase 126 13/64 inches
Length 211 inches
Width 80 inches
Height 63 19/64 inches
Front Tread 59 3/32 inches
Rear Tread 62 13/64 inches
Type OHV
Displacement 320.2 cu. in.
Cylinders 8
Bore & Stroke 3 7/16 & 4 5/16 inches
Compression Ratio-Std 7.2 to 1
Compression Ratio-Opt
Brake Horsepower 152@3600
Rated Horsepower 37.8
Torque 280@2000
Main Bearings 5
Valve Lifters Hydraulic
Block Material
Engine Numbers Starting 6240100-7
Engine No. Location Boss on right side of crankcase near rear.
Lubrication Pressure to all bearings excluding wrist pin
Type Dual downdraft
Make Carter or Stromberg
Type Dynaflow automatic
Drive Rear wheel drive
No. Of Gears 4
Gear Ratios
1st Not applicable
2nd Not applicable
3rd Not applicable
4th Not applicable
5th Not applicable
Reverse Not applicable
Not applicable
Clutch Size
Semifloating
Hypoid
Differential Ratio 3.90 to 1
Front Coil springs
Rear Coil springs
Ball bearing, worm & nut
Service Hydraulic drum
Front Size 12 inches
Rear Size 12 inches
Emergency Rear service brakes
Size 12 inches
Exhaust System Single
Ignition System Distributor and coil
Battery 6 volt storage battery
Cooling System Centrifugal pump with thermostat
Radiator Vee cellular
Fuel Type
Mileage
Wheel Type
Wheel Mfr
Wheel Size 15 x 6.5
Tire Type 4 ply
Tire Size 8 x 15
Spare Location Trunk
Fuel 19 Gallons
Oil 8 Quarts
Transmission 22 Pints
Cooling System 18 Quarts
Rear Differential 4 Pints
Front Differential Not applicable
Transfer Case Not applicable
Not Rated
VIN/Serial no. See Additional Information
VIN Description Total Digits: 8
Digits 1: Assembly plant
Digits 2-8: Production number
VIN Location Plate on left front door pillar & stamped on left front frame crossmember extension.
General VIN Decoder

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Additional Information
Serial Nos. 1-6031301 & up, 2-6050001 & up, 3-6055001 & up, 4-6061001 & up, 5-607001 & up, 6-6075001 & up, 7-6080001 & up.

Engineering Data - Buick Motor Division (1951)Detroit Public Library (Nat'l Auto. Hist. Collctn)
5201 Woodward
Detroit MI 48202
(313) 833-1456
www.detroit.lib.mi.us/nahc/index.htm
Serial No. Book for US Cars 1900-1975 G. BrighamHorseless Carriage Foundation
8186 Center St. Suite F P.O. Box 4119
La Mesa CA 91944-4119
(619) 464-0301
www.hcfi.org
Motor Age December 1945Los Angeles Public Library
630 West Fifth Street
Los Angeles CA 90071
(213) 228-7000
www.lapl.org
Motor Age January 1951Horseless Carriage Foundation
Paint Type
Colors Two Tone Colors Available
Barton Gray
Victoria Maroon Poly.
Sharon Green Poly.
Cloudmist Gray Poly.
Carlsbad Black
Verde Green
Imperial Blue Poly.
Geneva Green Poly.
Olympic Blue Poly.
Old Ivory
CaluMetallic Green Poly.
Venetian Blue Poly.
Galena Blue Poly.
Glenn Green
Standard/Optional Equipment
Power windowsStd
Power seatsStd
RadioOpt
Heater and DefrosterOpt
Rear Axle RatioOpt
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