Ford Model T Specifications


Detailed Specifications




Years of Manufacture

October 1, 1908 to May 26, 1927

Total Units Manufactured


Serial Number Location

If the chassis is marked the serial number is on the right frame near the firewall, or under the right floor board, matching the original engine number.


$850, later $350 with new manufacture innovations

Average Weight

1200 -1500 pounds

Wheelbase and Track

100 inch x 56 inch

Length and Width

134 inch x 66 inch


4 cylinder, 4 stroke, internal combustion gasoline engine, cast-en-bloc, 3 crank main bearings, "L" head with 2 side valves per cylinder, splash lubricated, water cooled

Engine Displacement

177 cubic inches - 2.9 litre (2900cc)

Engine Horsepower

20-22 BHP @ 1600 Maximum RPM

Engine Torque

83 Ft-Lbs @ 900 RPM

Cylinder Bore and Stroke

3.75 x 4.00 inches

Compression Ratio

4.5 to 1, Cylinder Pressure 50-70 psi

Bolt Torques – ft/lbs

5/16 – 15, 3/8 – 30, 7/16 – 45, 1/2 - 75

Intake Valve Gap

.010"-.012" (adjustable tappets, stock cam)

Exhaust Valve Gap

.012"-015" (adjustable tappets, stock cam))

Engine Oil Capacity

4 quarts, All Synthetic 10/30W recommended

Cooling System Capacity

14 quarts water or antifreeze 50/50 solution

Ignition System

Commutated 4 coil vibrating reed system. Electricity from 6 Volt battery or flywheel mounted magneto delivering from 4 to nearly 30 VAC

Firing Order


Coil Amps

1.2 - 1.4 A

Coil Point Gap

.029" - .031"

Spark Plug Types

Champion X, Champion 25, Motorcraft F-11

Spark Plug Gap

.031" - .035"

Magneto Clearance

.025" – .030" between magnet keeper faces and coil ring pole bosses

Fuel Capacity

10 Gallons - Range approx 200 mile.

Fuel Consumption

Approx. 20-25 MPG @ 35 MPH

Drive Type

Planetary transmission, 2 forward speeds, 1 reverse, rear wheel drive via torque tube driveline and bevel cut gear closed differential, final drive ratio 3.64/1

Differential Capacity

2 pints 90W – 120W

Wheels and Tires

Wood spoke demountable clincher rim "Artillery" wheels, tires balloon type 30x3" front, 30x3 ? rear

Inflation Pressure

55 psi (Clincher type), 35psi (Split rims & balloon tyres)

Front Axle Alignment

Camber 3 ?", Caster 5 ??, Toe-in 1/8"-1/4"

Top Speed

Approx. 45 MPH, normal cruise 35 - 40 MPH

Engine RPM@Speed

1400@35 MPH, 1600@40 MPH, 1800@45 MPH


The Model T Engine


Coil Boxes


The upper contact cushion spring should have approximately .005 clearance at A to the upper bridge D. This clearance should extend the full length of the cushion spring. Push the vibrator spring down to core and adjust nut C until the upper point just makes contact with a .029-.031 feeler gage. Lock C position with upper nut. Adjust tension on the vibrator spring by lightly tapping the back of the vibrator spring bridge (or by prying it up) until the coil draws 1.3 amperes at 6 volts input. When all 4 coils are properly adjusted, they should all have a uniform pitch like the sound of an angry bee, about 275 cps.