1907 CADILLAC

Cadillac offered four models for 1907:
Model G, Model H, Model K, and Model M

Model G	Model H	Model K	Model M

MODEL G ENGINE

Description	Four cylinder, L-head Individual cast iron cyl., copper water jacket
Bore & Stroke	4 x 4.5 in. (101.6mm x 114.3mm)
Displacement	226.2 cu. in. (3.707 liters)
Brake H.P.	20 hp
Engine description	Cylinders cast singly, copper water jackets, detachable combustion valve chamber; main bearings replaceable without removing crankshaft; interchangeable inlet and exhaust valves operated by push rod & roller cam follower on single gear driven camshaft; belt driven fan, water pump, and oiler; splash lubrication; three point engine suspension; clockwise cranking.
Carburetor	Float fed carburetor controlled by foot throttle or automatic ring-type governor; jet type carburetor made by Cadillac
Transmission type	selective sliding gear transmission, independently attached to frame

Frame	Pressed steel frame; two half-elliptic front, two full elliptic rear springs; worm and sector steering mechanism.
Clutch	Leather faced cone clutch
Drive	single universal in drive shaft to bevel drive line rear axle
Differential	spur gear differential
Brakes	foot brake internal, hand brake external on rear drums
Tires	32 x 3.5
Wheelbase	100"
Front/Rear Tread	56"

Bodies	Two door, five passenger Touring and three passenger (single rumble) Runabout, both with wooden dash
Price	$2000

Cadillac-built tops available at extra cost

Although the Model L Cadillac Limousine had a planetary transmission and 5" x 5" bore and stroke like the single cylinder Cadillac Runabout, the two models were entirely opposite in concept.
The single cylinder was a horseless carriage for the masses, the Model L a Nabob's throne-on-wheels.
Whether due to the Alanson Brush patent squabble, acute marketing perception, or both; Cadillac came up with a four cylinder design which met the expectations of customers who wanted just a bit more than the best one cylinder car could offer — an inexpensive, easily maintained, long lasting, precision built car — a "single cylinder Cadillac with four cylinders" — the Model G.
Serial numbers on plate on rear of body or on dash (with engine number).
Engine numbers were stamped on top surface of crankcase — in front of and to the left of number one (front) cylinder.
Model G engine numbers: 30003-30425 (1907), 30426-30500 (1907-1908).

Engine	Vertical, inline, L-head four cylinder, individual cast iron cylinders with copper water jacket
Bore & Stroke	4.375 x 5 in (111 mm x 127 mm)
Displacement	300.7 cu. in (4.927 liters)
Brake H.P.	30 hp
Engine description	Five main bearings, mechanical lifters
Carburetor	Throttled, float feed, jet type made by Cadillac
Transmission type	Planetary transmission
Speeds	Three forward and one reverse

Controls	Right hand drive with controls to the right
Clutch	Twin disc in flywheel, disc and 3 bands on transmission
Drive	shaft
Differential	Live axle, bevel drive, bevel differential
Brakes	Mechanical on two wheels — service and emergency on rear drums
Wheels	24"— 12 spoke wood artillery wheels
Tires	32 x 4
Wheelbase	102"
Front/Rear Tread	56.5"
Weight of 2-door Touring	2400 lb (1091 kg)
Weight of 2-door Coupe	2500 lb (1136 kg)

Price of 2-door Touring—5-passenger	$2500
Price of 2-door Limousine—6-passenger	$3600
Price of Runabout—2-passenger	$2400
Price of 2-door Coupe—2-passenger	$3000
Calendar year sales and production	509 (1906-1908)
Model year sales	509 (1906-1908)

The serial number was located on the plate on the rear of body or on dash (with the engine number).
Engine numbers were stamped on top surface of crankcase — in front of and to the left of number one (front) cylinder.
Engine No.: 10201-10709 (1906-1908).
Introduced January, 1906
Same notes as 1906 Model H except body lines of Touring was simplified and five passenger Limousine offered

Engine	Single cylinder, horizontal, with cylinder to rear, cast iron cylinder with copper water jacket, two main bearings, mechanical valve lifters
Bore & Stroke	5" x 5" (127mm x 127mm)
Displacement	98.2 cu. in. (1.609 liters)
Brake H.P.	10 hp
Carburetor	Updraft mixer, manufactured by Cadillac

Features	Same as 1906 except muffler much shorter with outlet at front rather than side oiler drive changed from cam to pulley and belt Engine/transmission drip pan added Runabout bodies remained the same as 1906 but front fenders were changed — nose of fender was now flattened and an inside skirt was added (early 1907 catalogs still showed the canted fender). For the first time, a factory-installed-only Victoria style top was offered, as well as a buggy top.
Tires	30 x 3
Wheelbase	74 in.
Overall length	9' 2"
Height	5' 6"
Front/Rear Tread	56" (61" opt)
Weight	1100 lb (550 kg)

Price of Victoria Runabout	$800
Notes	Prices on Cadillacs varied somewhat in different catalogs and ads, possibly due to severe economic crisis in 1907. Serial numbers on plate on rear of body (with engine number). Engine numbers were stamped in three places: Top right edge of cylinder flange, near the water outlet Top surface of left, front mounting leg On a plate at the rear of body with the serial number

Bulb horn; lights. Rubber top with sides & storm apron	$30.00
Leather top with sides & storm apron	$50.00

Engine	Single cylinder, horizontal, with cylinder to rear cast iron cylinder with copper water jacket two main bearings mechanical valve lifters
Bore & Stroke	5" x 5" (127mm x 127mm)
Displacement	98.2 cu. in. (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

Tires (touring)	30 x 3.5
Tires (other bodies)	32 x 3.5
Wheelbase	76"
Overall length	9' 7"
Height	5' 2"
Front/Rear Tread	56" (61" opt)
Brakes	Mechanical on two wheels contracting on inboard drums
Wheels	23" wood with 12 spokes

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

Chassis same as Model K except for two inch longer wheelbase.
Additional body styles offered.
Straight line Touring again available.
Folding Tonneau new.
Tonneau folds to look like runabout but this body not available on shorter Model K chassis.
First production one cylinder Coupe offered.
Serial numbers on plate on rear of body (with engine number).
Engine numbers were stamped in three places on the crankcase
- On the top of the crankcase at the right edge of cylinder flange, near water outlet
- On the top surface of the crankcase at the left, front mounting leg
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