Specifications, Part & Services, Museums & Clubs for Antique, Classic, Vintage and Muscle Cars

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1934 Hupmobile 421J Series
Coupe
Standard Specifications
  Show Summary  
Original Base Price $1,195.00
No. Produced 2,264
Body Maker
No. Doors 2
Passengers 2-4
Model Number
Weight
Wheelbase 121 inches
Length
Width
Height
Front Tread 58 1/4 inches
Rear Tread 60 9/16 inches
Type Own, L-head
Displacement 245.3 cu. in.
Cylinders 6
Bore & Stroke 3 1/2 & 4 1/4 inches
Compression Ratio-Std 5.75 to 1
Compression Ratio-Opt Not applicable
Brake Horsepower 93@3400
Rated Horsepower 29.4
Torque
Main Bearings 4
Valve Lifters
Block Material
Engine Numbers
Engine No. Location On left side of block.
Lubrication Pressure to all bearings excluding wrist pin
Type Single downdraft
Make Stromberg
Type Helical
Drive Rear wheel drive
No. Of Gears 3
Gear Ratios
1st 2.819 to 1
2nd 1.604 to 1
3rd 1 to 1
4th Not applicable
5th Not applicable
Reverse 3.383 to 1
Single plate
Clutch Size 9 7/8 inches
Semifloating
Spiral bevel
Differential Ratio 4.45 to 1
Front Semi-elliptic leaf springs
Rear Semi-elliptic leaf springs
Worm & roller
Service Steeldraulic
Front Size 12 inches
Rear Size 12 inches
Emergency Internal expanding on 4 wheels
Size 12 inches
Exhaust System
Ignition System Distributor and coil
Battery
Cooling System Water pump
Radiator Cellular
Fuel Type
Mileage
Wheel Type Wire
Wheel Mfr
Wheel Size
Tire Type
Tire Size 6.5 x 16
Spare Location
Fuel
Oil 6 Quarts
Transmission 2 1/2 Pints
Cooling System 16 Quarts
Rear Differential 3 1/2 Pints
Front Differential Not applicable
Transfer Case Not applicable
Not Rated
VIN/Serial no. J12,001 and up
VIN Description
VIN Location On right side of dash under hood.
General VIN Decoder

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Additional Information
No. produced is calendar year production for the series.

The Production Figure Book for U.S. Cars Jerry HeasleyHorseless Carriage Foundation
8186 Center St. Suite F P.O. Box 4119
La Mesa CA 91944-4119
(619) 464-0301
www.hcfi.org
Chilton Flat Rate & Tune Up Manual Thirteenth Edition 1939Horseless Carriage Foundation
Automobile Trade Journal April 1934Horseless Carriage Foundation
Paint Type
Colors Data not yet collected
Standard/Optional Equipment
Data not yet collectedStd
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