<ul data-eligibleForWebStory="false">Fresh details on the upcoming Tata Sierra SUV reveal it will launch with three powertrains – petrol, diesel, and electric.Lower variants of the Sierra will have a new 1.5L NA petrol engine to achieve competitive pricing.Higher variants will feature a 1.5L turbo petrol engine, delayed for perfection, producing 170bhp and 280Nm.The Sierra will also offer an electric powertrain, potentially with over 500km range, similar to Tata Harrier EV.