Sunroof and AMT?

Tata is expected to offer the Tiago/Altroz’ 1.2-litre, 3-cylinder Revotron petrol engine in the HBX. This motor, which is now BS6-compliant and is likely to get a 5-speed MT and an optional AMT. As for sunroof, there's no official update from the brand's end. Moreover, the micro-SUV could feature a 7-inch touchscreen system, a semi-digital instrument cluster, and auto AC. Stay tuned for further updates.

If Tata offer 4 cylinder engine in this car than it would be great punch to other carmaker

Yes