Third Party Car Insurance is a risk cover, under which the insurer compensates any legal liabilities claimed by the other party, in case the insured vehicle is at fault. However, as per the Motor Vehicles Act 1988, Section 146, plying an uninsured vehicle on Indian roads is an offence. This is why liability insurance is also known as ‘Act Only’ plan. This plan doesn’t cover the insured or his car.
Comprehensive insurance is a coverage that helps pay to replace or repair your vehicle if it's stolen or damaged in an incident that's not a collision. Comprehensive typically covers damage from fire, vandalism or falling objects (like a tree or hail). If you're financing or leasing your car, your lender likely requires comprehensive coverage. If you own your vehicle outright, it's an optional coverage on your car insurance policy.