A-po - Aero
- A-post
- Acceleration
- Acceleration ability
- Acceleration lane
- Acceleration pump
- Accelerator
- Accelerator jet
- Accelerator linkage
- Accelerator pedal
- Accelerator-heel point
- Accelerometer
- Acceptance test
- Access road
- Accessories
- Accumulator
- Accumulator indicator
- Acidometer
- Ackerman principle
- Ackermann angle
- Ackermann steering angle
- Ackermann steering linkage
- Active restraint
- Active safety
- Actual size
- Additional brake
- Adhesion
- Adiabatic engine
- Adjustable seat
- Adjustable steering column
- Adjustable wrench (adjustable spanner)
- Advance stop
- Advanced ignition
- Advanced injection
- Advertising car
- Aerator
- Aerial (antenna)
- Aerial motor
