Inst - Jack
- Instability
- Installed power
- Instantaneous centre of turning
- Instantaneous piston speed
- Instruction manual
- Instrument panel
- Insulating tape
- Insurance
- Insurance against all risks
- Insurance against fire
- Insurance against responsibility
- Insurance against theft
- Intake depression
- Intake manifold
- Intake port
- Intake stroke
- Intake valve
- Integral body construction
- Interchangeability
- Interchangeable
- Interchangeable port
- Intercity bus
- Intercooler
- Intercooling
- Interference suppressor
- Interior heater
- Interior lamp
- Interlock
- Intermediate engine overhaul
- Intermediate overhaul (intermediate repair)
- Internal combustion engine
- Internal expanding brake
- Internal gear
- Internationl driving licencse
- Inverted carburetter
- Inverted scavenging
- Irreversibility
- Iso-octane
