The displacement of an engine is the total volume of all of the cylinders in the engine. Measured in cubic centimetres (cc)

ICE engines have one or more cylinders. More cylinders typically mean more smoothness and more power, but it also means more moving parts and less fuel efficiency.

The number of intake and exhaust valves in each engine cylinder. More valves per cylinder means better engine breathing and better performance but it also adds to cost.

A mild hybrid car, also known as a micro hybrid or light hybrid, is a type of internal combustion-engined car that uses a small amount of electric energy for assist.

The maximum number of people that can legally and comfortably sit in a car.

The total number of doors in the car, including the boot if it's considered a door. It affects access and convenience.