Seat upholstery is offered either in fabric or leather.

States if the glove compartment is illuminated.

Fog lamps help visibility when it is in short supply, and are therefore needed if you live in a place where winters mean frequent periods with fog. No real gain in clear conditions.

Proximity sensors fixed in the rear (and sometimes front) bumper that give either audible or visual indication of how far your car's bumpers are from obstacles.

Locking one door (usually one of the front doors) engages or disengages the locks on all doors.

Means that you don't have to take your key to the fuel filler flap. Most cars have either a cable release accessible from the driver's seat, or a push release that unlocks with the central locking.

An Anti-Lock Braking system helps you retain steering control during panic stops and in low-grip situations like in the wet. It regularly will shorten on-road stopping distances as well. A must-have that is well worth every paisa.

Inflatable bags of gas that deploy in the event of a crash, preventing injury - for example, like that arising from a driver's face hitting the steering wheel during a crash. In cars with eight or more airbags, they practically surround the occupants in a crash, insulating them from the worst. They need to be used in conjunction with seat-belts, else they aren't effective.

The Electronic Stability Program makes sure that the vehicle is travelling in the direction that the front wheels are pointing, thus ensuring greater vehicle control.

Headlamps that turn on automatically once it gets dark.

Makes the rear doors non-responsive to the inside door handles. They open with the outside handles, though. Prevents unsupervised children or escaping convicts from opening the rear doors.

A high compression ratio generally denotes a more efficient and/or powerful engine. However, high compression ratios and poor fuel don't mix well.

Valves are what allow air and fuel in and out of your engine. More the valves, the better your engine will breathe and the more efficient it will be. The 2-valve-per-head designs offer very good torque at low revs, making them very good for commuting.