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Tata Sierra, Curvv to get new 1.5 TGDi, 1.2 TGDi turbo petrol engine; specifications…

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At Auto Expo 2023, Tata Motors showcased its upcoming 1.2-litre and 1.5-litre turbocharged gasoline direct injection (TGDi) engines which will debut with the Curvv and Sierra, respectively. More importantly, these new engines are BS6 2.0 compliant and can run on a 20 percent petrol-ethanol (E20) fuel blend. 

  1. Tata’s new 1.2 TGDi to debut on Curvv in 2024
  2. 1.5 TGDi will debut on Sierra in 2025

Tata’s new TGDi engines: what do they get?

Tata’s new engines are constructed using aluminium and are stiffer in construction. They are also said to have improved performance, compared to the current crop of engines, as well as better fuel efficiency. Furthermore, Tata’s new engines will come with features like dual cam phasing, which is essentially variable valve timing, affecting the way cams behave at certain revolutions. They will also get a variable oil pump as well as an integrated exhaust manifold in the cylinder head. 

Furthermore, the new TGDi engines will also be fitted with a water-cooled variable geometry turbocharger, which Tata claims will provide better torque from lower in the rev range for better acceleration. Tata has also managed to reduce the cost of ownership of these engines by fitting them with new valve trains and timing chains which will give them a longer service life. 

Tata 1.2 TGDi engine: specifications

The smaller 1.2-litre direct injection turbo-petrol engine is a three-cylinder unit displacing 1,198cc. It produces 125hp at 5,000rpm and 225Nm of torque between 1,700 and 3,500rpm. It is expected to be mated to both a manual as well as an automatic gearbox. In comparison, the current 1.2-litre turbo petrol engine makes 120hp at 5,500rpm and 170Nm between 1,750 and 4,000rpm. 

The 1.2 TGDi engine will debut on the ICE version of the Tata Curvv, which is slated to release sometime in 2024. It could also trickle down to the Nexon and Altroz, if it makes business sense for Tata to do so. 

Tata 1.5 TGDi engine: specifications

The larger 1.5 TGDi direct injection turbo-petrol engine is a four-cylinder unit displacing 1,498cc. It churns out 170hp at 5,000rpm and 280Nm of torque between 2,000 and 3,500rpm. Like the smaller 1.2 unit, it will also be mated to manual and automatic gearboxes. 

Tata will debut this 1.5 TGDi engine with the ICE version of the Sierra, which will go on sale by 2025. It will also be plonked in the Harrier and Safari facelifts soon after, and could also be offered with the Curvv. 

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