Cadillac Series 65
Specs, engines and history
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By Felix Hartmann, Automotive Technology & EV Contributor
The Cadillac Series 65 was a short-lived mid-priced Cadillac of the 1937 and 1938 model years. It combined the long wheelbase of the Series 70 with a cheaper Fisher body and the 5.7-litre Monobloc V8, and it sat between the Series 60 and the Fleetwood-bodied Series 70 in the price list. Only 3,877 cars were built before Cadillac reorganised its range for 1939.
In short
- Built for the 1937 and 1938 model years in Detroit; 2,401 and 1,476 cars.
- 346 cu in (5.7-litre) Monobloc side-valve V8 with 101 kW (135 hp) at 3,400 rpm, three-speed manual gearbox.
- Four-door sedan in 1937; a better-equipped sedan and a four-door convertible sedan were added in 1938.
- Replaced by the Series 61 and the Sixty Special for 1939.
Cadillac Series 65 at a glance
| Item | Details |
|---|---|
| Maker | Cadillac, division of General Motors; assembled in Detroit, Michigan |
| Designer | Harley Earl (GM styling) |
| Production | 1937–1938 model years |
| Built | 3,877 (2,401 in 1937, 1,476 in 1938) |
| Body | GM C-body by Fisher: four-door sedan; four-door convertible sedan in 1938 |
| Layout | front engine, rear-wheel drive |
| Engine | 346 cu in (5.7 l) Monobloc V8, 101 kW (135 hp) |
| Gearbox | three-speed synchromesh manual |
| Successor | Cadillac Series 61 and Sixty Special (1939) |
The Cadillac catalogue on 1cars lists the Series 65 with the other pre-war Cadillac series, and the history of Cadillac describes the company in the 1930s.
Series 65 production timeline
| Year | Event |
|---|---|
| 1936 | Series 60 introduced as the lower-priced Cadillac with a 322 cu in V8 |
| 1937 | Series 65 launched between the Series 60 and Series 70; all Monobloc V8s enlarged to 346 cu in |
| 1937 | 2,401 Series 65 sedans built |
| 1938 | new front end shared with the Series 75; column gearshift; convertible sedan added |
| 1938 | 1,476 Series 65 cars built |
| 1939 | Series 65 dropped; Series 61 and Sixty Special take over |
Where the Series 65 fitted in the 1937 Cadillac range
In 1937 Cadillac offered six series, from the V8 cars up to the sixteen-cylinder flagship:
| Series | Engine | Position |
|---|---|---|
| Series 60 | V8 | lowest-priced Cadillac, introduced in 1936 |
| Series 65 | V8 | new for 1937, Fisher body on the long wheelbase |
| Series 70 | V8 | Fleetwood body |
| Series 75 | V8 | largest V8 series |
| Series 85 | V12 | twelve-cylinder series |
| Series 90 | V16 | sixteen-cylinder series |
Below the Series 60 was the LaSalle, GM's companion brand to Cadillac. The Series 65 therefore offered the size of a Series 70 for less money. German Wikipedia, citing the Standard Catalog of Cadillac, puts its 1937 price about US$400 above the Series 60 sedan and US$500 below the Fleetwood-bodied Series 70 touring sedan.

Development and production history
The Series 60 of 1936, developed under Cadillac manager Nicholas Dreystadt, had proved that a cheaper Cadillac could sell: it accounted for half of all Cadillacs in its first year. For 1937 Cadillac filled the next gap in the range. Instead of a new body, it took the large GM C-body that Fisher built and put it on the 131 in (3,327 mm) wheelbase of the Series 70, also used by the Buick Roadmaster. The Series 60 used the smaller B-body on a 124 in (3,150 mm) wheelbase, so the Series 65 offered 177 mm (7 in) more between the axles for the same engine and 101 kW (135 hp). To set it against other pre-war cars in the catalogue, use the 1cars comparison tool.
In its first year the Series 65 was a single model, a four-door five-seat sedan with three side windows on each side, listed at US$1,945. Cadillac built 2,401. For 1938 the range grew to a better-equipped sedan and a four-door convertible sedan, priced from US$2,285 to US$2,600, but production fell to 1,476. For 1939 Cadillac reorganised its mid-range around the Series 61 and the Sixty Special, and the Series 65 was not continued.
Design and engineering
The Series 65 had an all-steel body except for wooden main sills. It used Bendix dual-servo brakes and GM's Knee-Action independent front suspension. The quarter windows slid instead of being hinged, the rear corners were rounder than on earlier Cadillacs, and the boot was blended more smoothly into the body. Sidemount spare-wheel covers hinged to the wings were an option.
For 1938 the Series 65 shared its front end with the Series 75: a vertical cellular grille, three sets of horizontal bars on the bonnet sides, an alligator-type bonnet that opened from the front, and headlamps mounted in the space between the wings and the bonnet. The wheelbase grew to 132 in (3,353 mm). Under the skin the 1938 chassis brought a column-mounted gear lever, horns behind the grille, the battery under the right side of the bonnet, a transverse silencer behind the fuel tank, a "Synchro-Flex" flywheel and a hypoid rear axle. The engine lost its oil filter.

Monobloc V8 engine and drivetrain
All V8 Cadillacs of 1937 used the Monobloc side-valve V8, enlarged that year from 322 to 346 cu in (5.7 litres). In the Series 65 it was the only engine and produced 101 kW (135 hp) at 3,400 rpm. German Wikipedia gives about 99 kW (135 PS); the difference reflects the hp and PS units. A Stromberg AA-25 carburettor (AAV-25 in 1938) with an electric choke fed the engine. Drive went to the rear wheels through a three-speed synchromesh manual gearbox.
Cadillac Series 65 specifications
| Parameter | Metric | Imperial |
|---|---|---|
| Engine | 5.7 l side-valve V8 | 346 cu in |
| Power | 101 kW at 3,400 rpm | 135 hp |
| Wheelbase (1937 / 1938) | 3,327 / 3,353 mm | 131.0 / 132.0 in |
| Length (1937 / 1938) | 5,288 / 5,370 mm | 208.2 / 211.4 in |
| Width (1937 / 1938) | 1,890 / 1,971 mm | 74.4 / 77.6 in |
| Height (1937 / 1938) | 1,765 / 1,727 mm | 69.5 / 68.0 in |
| Commercial chassis wheelbase | 4,064 mm | 160.0 in |
| Gearbox | three-speed manual | - |
Series 65 variants
| Variant | Years | Body / purpose | Engine | Notes |
|---|---|---|---|---|
| Series 65 sedan | 1937 | four-door, five-seat sedan by Fisher | 5.7 V8 | US$1,945; 2,401 built |
| Series 65 sedan | 1938 | four-door sedan, Series 75 front end | 5.7 V8 | part of 1,476 built in 1938 |
| Series 65 Imperial sedan | 1938 | better-equipped four-door sedan | 5.7 V8 | listed by German Wikipedia |
| Series 65 convertible sedan | 1938 | four-door convertible | 5.7 V8 | top of the 1938 price range |
| Commercial chassis | 1937–1938 | long chassis for commercial bodies | 5.7 V8 | 160 in wheelbase |
The Series 65 today
With fewer than 4,000 cars built in two years, the Series 65 is a rare pre-war Cadillac. Survivors still change hands in Europe and the United States, as sale videos from Bilweb Auctions in Sweden and Gateway Classic Cars in the US show. The car shares its V8 with the other Cadillac series of 1937–1938 and its C-body and wheelbase with the Series 70. When buying, check the wooden sills under the steel body and confirm the series from the chassis and body numbers, because 1938 Series 65 and Series 75 cars look alike from the front. More cars of the period are collected in the classics section.

FAQ
When was the Cadillac Series 65 produced, and where?
In the 1937 and 1938 model years, in Detroit, Michigan.
How many Cadillac Series 65 were built?
3,877: 2,401 in 1937 and 1,476 in 1938.
What engine does the Cadillac Series 65 have?
The 346 cu in (5.7-litre) Monobloc V8 with 101 kW (135 hp), with a three-speed manual gearbox.
What replaced the Series 65?
For 1939 Cadillac reorganised its mid-range around the Series 61 and the Sixty Special.


