Camera-only or radar ADAS: which is better in India

If you have to choose between two cars at the same price and one has a camera plus radar while the other has only a front camera, buy the one with radar. Radar keeps measuring distance and closing speed in rain, dust, glare and darkness, which is when camera-only systems get least confident. That is the short answer. The longer answer is that the sensor list tells you less than you think, because tuning decides whether the system is useful or annoying.

What each sensor is good at

A monocular camera is a cheap, very capable sensor. It reads lane markings, traffic signs and the shape of what is ahead, and classifies it as a car, a truck, a pedestrian or a two-wheeler. Honda's setup in India is the clearest example of a camera-only approach. Autocar Professional reported that Honda Sensing on the Amaze, City and Elevate uses a Valeo monocular camera behind the windscreen with a 120-degree field of view, running Mobileye vision, and no radar at all, which the report says cuts cost by dropping radar and lidar from the bill of materials. The same report lists the operating windows: adaptive cruise above 25 kph, collision mitigation braking most effective between 5 kph and 30 kph, and road departure mitigation between 72 kph and 180 kph. It also notes that performance drops in low light, fog and rain, and when the camera's view is blocked by dirt or a sticker on the glass.

Radar does not care about light. It gives range and relative speed directly, so forward collision warning and emergency braking stay sharper at night and in bad weather. Mahindra's own release for the XUV700 says the forward collision warning and autonomous emergency braking use both camera and radar. The trade-off is cost, a sensor sitting low in the front bumper area where Indian traffic collects its scrapes, and one more item that needs aiming after a front-end repair.

Why two cars with the same hardware score differently

Euro NCAP's assisted driving gradings make the point better than any spec sheet. The BYD Atto 3 appears twice, graded Moderate with one supplier's cruise control system and Good with another. The Volvo EX30's Pilot Assist and the MG ZS are both graded Moderate, while the Kia EV3, Renault 5 and Porsche Macan are graded Very good. Same broad sensor types, different outcomes, because the grade also covers how honestly the car keeps the driver engaged and what it does when the system gives up. Those are European cars and the India-spec software can differ, so treat the gradings as a lesson in what to ask, not a shopping list.

In the showroom, ask three things. Does this variant have a front radar or only a camera. Does the AEB claim cover two-wheelers and pedestrians, not just cars. And read the owner's manual pages on ADAS before you sign, because the speed limits and the "system may not operate" list are the real specification.

What is coming, and what it costs you to wait

Mobileye says Mahindra has picked its SuperVision and Surround ADAS for at least six models with production from 2027, with Mobileye as tier-1 supplier and India described as a localisation and production hub. Surround ADAS uses five cameras and multiple radars on one EyeQ6 High chip, SuperVision uses 11 cameras and optional radars on two chips.

For a buyer today that matters in one way only. Hands-off, eyes-on highway driving is a 2027-and-later feature in India. Everything on sale now expects your hands on the wheel and your eyes up, whatever the brochure calls it.

Sources

• Tech Talk: Honda and Valeo drive affordable ADAS in India
• Mahindra: India's Safest Car, XUV700
• Euro NCAP assisted driving gradings
• Mahindra selects Mobileye ADAS systems for six future models
• Mobileye newsroom