I have booked the Tata Sierra Adventure Plus petrol manual, but I am now confused between the petrol and diesel manual variants, particularly in terms of mileage and performance. I am not interested in an automatic transmission. My annual running is less than 6,000 km. Could you please advise which engine option would be more suitable for my usage? Additionally, I would appreciate any alternative suggestions for a spacious car with good mileage that fits my needs.

Autocar India

•1d

With under 6,000 km a year and the Adventure Plus in mind, I’d pick the Sierra Adventure Plus petrol automatic for you. At this running, petrol makes more sense day to day. It is smoother and quieter in the city, usually costs less to buy, and you avoid the diesel exhaust filter worries that can crop up if most of your trips are short and at low speeds. For your likely mix of city use and the odd trip, the petrol automatic will feel easy and relaxed, with enough power for family runs.The trade-offs to note are that on long highway drives with a full load, the diesel automatic will feel stronger when pulling from low speeds and will use less fuel, so it suits heavy touring better.If your plan changes to frequent highway trips or 15,000 km-plus a year, then the diesel automatic becomes the smarter pick. Otherwise, for your current use, the Tata Sierra Adventure Plus petrol automatic lines up best.

Tata Sierra

Autocar India

•1d

Mostly city driving with the odd highway run and a strong focus on features, in that case, from your two, I would pick the Tata Sierra 1.5 turbo-petrol automatic in the top trim. It is feature-packed, with a refined and powerful engine, and its torque-converter automatic is smoother in city traffic than the Kia Seltos’ DCT.That said, Kia has a more consistent reputation for service in most cities, which is one of your main requirements. Tata’s service has improved, but dealer experience can vary by city, so check reviews in your area. If that is a concern, then the Seltos is a good alternative, packed with the feel-good features you asked for, like a 360-degree camera, ventilated front seats, and a panoramic sunroof. A trade-off to note for your city use: the DCT can hesitate a bit at slow speeds.Overall, for mostly city use and a feature-rich cabin, the Sierra turbo-petrol automatic in the top trim fits your brief.

Tata Sierra

Kia Seltos

Autocar India

•4h

Go for the Kia Seltos diesel automatic. It suits your usage far better, especially with your highway-heavy driving and need for strong low-end pull. In real-world driving, the diesel feels effortless and relaxed. You get strong pulling power from low speeds, which makes overtaking easy without needing to push the engine hard. On highways, it feels calm and confident, and the automatic gearbox is smooth and predictable, which adds to the overall ease of driving.The more powerful turbo petrol DCT, in comparison, is the more fun and responsive option, but its performance comes higher up the rev range. So you need to push it more for overtakes, and in city traffic, the DCT can sometimes feel a bit jerky. It is enjoyable when you are driving enthusiastically, but not as effortlessly as the diesel.

Kia Seltos