Cadillac Models & History M 1907

TheModel M chassis was the same as the Model K except for a two inch longer wheelbase. Additional body styles were offered. Straight line Touring model was available again. The folding Tonneau was new. The tonneau folded to look like a runabout but this body was not available on the shorter Model K chassis.

First production one cylinder Coupe offered.

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1907 Cadillac Model M Victoria Touring

I.D. NUMBERS

Serial numbers on plate on rear of body (with engine number). Engine numbers were stamped in three places on the crankcase:

  1. On the top of the crankcase at the right edge of cylinder flange, near water outlet
  2. On the top surface of the crankcase at the left, front mounting leg
  3. On a plate on the rear of body

Blank spaces on the patent plate were for additional patent dates, not engine or serial number

Serial number: 21851 to 22150 and 24075 to 24350

MODEL M ENGINE

Engine
  • Single cylinder, horizontal, with cylinder to rear
  • cast iron cylinder with copper water jacket
  • two main bearings
  • mechanical valve lifters
Bore & Stroke
127mm x 127mm
Displacement
1.609 Liters
Brake H.P.
10 hp
Engine description
Two main bearings, mechanical valve lifters
Carburetor
Updraft mixer manufactured by Cadillac
Transmission
Planetary
Gears
3 forward, 1 reverse
Gear ratios
Low: 3:1; High: 1:1; Reverse: 3:1
Drive
Chain
Differential
Spur gear
Overall ratio
3.1:1 to 5:1 depending on drivetrain option

 

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1907 Cadillac Model M

MODEL M CHASSIS

Tires (touring)
30 x 3.5
Tires (other bodies)
32 x 3.5
Wheelbase
1930mm
Overall length
2921mm
Height
1575mm
Front/Rear Tread
1422mm
Optional Front/Rear Tread
1549mm
Brakes
Mechanical on two wheels contracting on inboard drums
Wheels
23″ wood with 12 spokes

MODEL M DRIVETRAIN

  • Different combinations of 9 or 10-tooth driving sprocket with 31, 34, 38, 41, or 45-tooth driven sprocket gave ten possible ratios from 3.1:1 to 5:1.
  • Lower ratios for runabout to be run on smooth, level roads to higher ratios for loaded delivery cars to be run on rough, hilly roads.
  • Instructions for changing sprockets were furnished to owners, but the change involved disassembly of the transmission and rear axle — definitely not a “quick-change” set-up

 

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1907 Cadillac Model M

 

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1907 Cadillac Model M

MODEL M OPTIONS

Bulb horn
Lights
Rubber cloth Cape Cart top for Touring
$100.00