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1931 CADILLAC Cadillac Index
Three models were offered for 1931: a series 355-A with eight cylinders, a series 370-A with twelve cylinders, and a continuation of the 1930-31 series 452 and 452-A V-16.

1931 Cadillac


The 355-A, eight cylinder, was similar to the Series 353 of 1930 except the body was longer and lower. The hood was also longer with five hood ports or rectangular doors. The cowls had matching doors. the coach sill was modified and there were no compartments in the splash pan. The battery and tool compartments were located under the front seat. The floor boards were metal. The instrument panel was oval with the same grouping as the Series 353. It also featured a radiator screen, single bar bumper, and dual horns. The headlight diameter was reduced one inch.

1931 Cadillac

The frame was new with divergent side rails. The rear spirngs were mounted directly under the frame rails. There were metal covers on the springs. The radiator was mounted lower in the frame. The cooling system contained a condenser tank.

1931 Cadillac

The engine displacement was the same as the Series 353, but the series designation on the V-8 models no longer matched the displacement. The V-8 now had a five point engine suspension similar to the V-16. An intake muffler was added. The distributor was 1.5 inches higher than on the 345. The fan was mounted lower to match the lower mounted radiator.

1931 Cadillac

Serial numbers were not used. The engine numbers were stamped on the crankcase just below the water inlet on the right hand side. It started with 800001 and ended with 810717.

1931 Cadillac

FISHER
StyleDoorsTypePassengersPriceWeight
312524Town sedan5$28454675
312582Coupe2/4$26954480
312594Sedan5$27954660
312624Sedan7$29454760
312634Imperial sedan7$30954835
312722Coupe5$27954500

FLEETWOOD
StyleDoorsTypePassengersPriceWeight
45022Roadster2/4$28454450
45034Sedan7  
45352Convertible Coupe2/4$29454450
45504Transformable Town Cabriolet7  
45574Transformable7$3195 
45604Phaeton4/5$29454395
45804All weather phaeton5$37954685

ENGINE

Type90 degree L-head - eight cylinder
MaterialCast iron on aluminum crankcase
Bore and stroke3-3/8" x 4-15/16"
Displacement353 cu. in.
Compression ratio5.35:1 (opt 5.26:1)
Brake horsepower95 plus @ 3000 rpm
Taxable horsepower36.45
Main bearings3
Valve liftersmechanical
CarburetorCadillac and Johnson, with intake silencer

CHASSIS

FeatureSeries 355-ASeries 355-A Commercial Chassis
Wheelbase134"152"
Overall length203" 
Height72.5" 
Front tread57.25" 
Rear tread59.5" 
Tires (std)6.50 x 19 
Tires (opt)7.00 x 18 

TECHNICAL
TransmissionSelective, synchro
Speeds3 forward, 1 reverse
Controlsleft-hand drive with center controls (right-hand optional)
ClutchTwin disc
DriveShaft drive with torque tube
Rear axle3/4 floating rear axle
Rear drivespiral bevel drive
Overall ratiostd 4.75:1, opt 4.07:1, 4.54:1
BrakesMechanical on four wheels
Wheels (std)Wood artillery
Wheels (opt)Wire, disc, or demountable wood
Wheel size (std)19"
Wheel size (opt)18"

OPTIONS

Trunks$100 - 119
Tonneau Windshield$185
Wind wings$25 - 47.50
Tire covers$5.00 - 40.00
Mirrors$10 - 32 / pair
Radioprice on application
Heater$41 - 55
Auxilliary lights$37.50 - 75.00
Seat covers$26.75 - 73.50
Heron or Goddess$20.00
5 wire wheels$70
6 wire wheels with fender wells and trunk rack$240
5 demountable wood wheels$50
6 demountable wood wheels with wells and rack$230
4 natural wood wheels$10

HISTORICAL



1931 Cadillac

The Cadillac Series 370-A (a twelve cylinder) was similar to the 1930-31 V-16. except some bodies were built by Fisher, but all body interiors were built by Fleetwood. The coach sill was modified with a single molding on the splash shield. The battery was mounted in the right front fender. The hood was four inches shorter than the V-16 and five inches longer than the V-8. The instrument panel was similar to the V-8 panel. The headlights were one inch smaller in diameter than the V-16 headlights. The dual rear lights were ball shaped like the V-8. The dual horns were slightly smaller than on the V-16.

1931 Cadillac

The frame had divergent side rails like the Series 355. The rear springs were mounted under the frame rails. The front tread was the same as the V-8. The brakes had a vacuum assist which was operated only from the left manifold. The brake drums were 15 inches. The sedans had two wheelbases: 140" and 143"; but the semi-commercial unit had a 152" wheelbase.

1931 Cadillac

The engine had dual intake silencers which were slightly smaller than the single unit on the V-8 and were positioned at the rear where the V-16 vacuum tanks were mounted. The carburetors were similar to the V-16, but they were reversed so that the air inlet was at the rear. A single vacuum tank was mounted on the center of the dash where the V-16 oil filter was mounted. The oil filter was mounted on the left side of the crankcase. The bore was 1/8 inch larger than the V-16. The rear center main (number 3) takes the thrust. The exhaust manifolds had two sections rather than three. The spark plug wires came out the top of the distributor cap rather than the rear.

1931 Cadillac

Serial numbers were not used on the 1931 Series 370-A. The engine numbers were stamped on the right hand side of the crankcase, on the generator drive chain housing. It started with 1000001 and ended with 1005733.

StyleDoorsModelPassengerPriceWeight
Fisher 140" Wheelbase
311524Town sedan5$39455330
311582Coupe2/4$37955135
311594Sedan5$38955315
311722Coupe5$38955155

Fisher 143" Wheelbase
StyleDoorsModelPassengerPriceWeight
311624Sedan7$41955445
311634Imperial Sedan7$43455520

Fleetwood 140" Wheelbase
StyleDoorsModelPassengerPriceWeight
47022Roadster2/4$39455010
47352Convetible Coupe2/4$40455105
47574Transformable7$4295 
47604Phaeton5$40455050
47804All weather phaeton5$48955340
47852Convertible coupe5  

Fleetwood 143" Wheelbase
StyleDoorsModelPassengerPriceWeight
47504Full Coll Cabriolet7  
48124Transformable Town Cabriolet5/7  
48204Transformable Town Cabriolet5/7  
48254Transformable Town Cabriolet7  
4825-C4Coll Transformable Town Cabriolet7  
48304Imperial Sedan5/7  
4830-S4Sedan5  
48504Transformable Cabriolet7  
48554Imperial Cabriolet5/7  
4855-S4Sedan Cabriolet5  
4856-A4Imperial Sedan8  
48644Town Brougham5  
4864-B4Town Brougham5  
4864-Q4Town Brougham5  
48754Imperial Sedan7  
4875-S4Sedan7  
48824Sedanette7  
48834Limousette7  
48914Transformable Limousine Brougham7  


1931 Cadillac

ENGINE

Type45 degree overhead valve
CylindersTwelve
MaterialCast iron on aluminum crankcase
Bore & stroke3-1/8 x 4.00"
Displacement368 cu ft
Compression ratio5.38:1, 5.20:1, 5.03:1
Brake horse power135 @ 3400 rpm
SAE/Taxable HP46.9
Main bearings4
Valve liftersMechanical with hydraulic silencer on rocker bushing
CarburetorDual Cadillac/Johnson with intake silencer


1931 Cadillac

CHASSIS

Wheelbase series 370-A140"
Wheelbase 7 pass Sedan & Imperial143"
Wheelbase commercial152"
Overall length210 - 220"
Height72.5"
Front tread57.25"
Rear tread59.5" (beginning with chassis serial number 10-2720, tread is 60.5")
Tires7.00 x 19 whitewall
Optional tires7.50 x 18

1931 Cadillac

TECHNICAL

TransmissionSelective synchro transmission
Speeds3 forward, 1 reverse
Controlleft hand steering, control mounted in center, right hand optional
ClutchTwin disc
DriveShaft drive with torque tube
Axle3/4 floating rear axle
Differentialspiral bevel
Overall ratiostd 4.54:1, opt 4.07:1, 4.91:1
BrakesMechanical brakes on 4 wheels with vacuum assist
Brake drums15"
Wheels (std)wood artillery
Optional wheelswire, disc, demountable wood
Wheel sizestd 19", opt. 18"

HISTORICAL



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