Tata Revotron engine

The Tata Revotron engine^[1] is a 1.2-liter 3-cylinder petrol engine. It is produced by Tata Motors and was used in their passenger vehicles beginning in 2014.

Revotron Engine
Overview
Manufacturer	Tata Motors
Production	2014-present
Layout
Configuration	Inline-3
Displacement	1.2 L (1,199 cc)
Cylinder bore	77 mm (3.0 in)
Piston stroke	85.8 mm (3.38 in)
Compression ratio	10.8:1
Combustion
Fuel type	Gasoline, CNG
Output
Power output	86 PS (85 hp; 63 kW), 110 PS (110 hp; 81 kW) (turbo, 2017-2020) 120 PS (120 hp; 88 kW) (turbo, 2020-present) 74 PS (73 hp; 54 kW) (iCNG in Tiago & Tigor)

History

The Revotron series began with a 1.2-liter, 4-cylinder turbocharged engine introduced in 2014 for the Bolt and Zest. This engine featured a single overhead camshaft with two valves per cylinder and multi-point fuel injection. It delivered 88 hp (65 kW) at 5,000 rpm and 100 lb⋅ft (140 N⋅m) of torque between 1,500 and 4,500 rpm. It included multiple driving modes for improved response, a smart engine control unit, an eight-holed fuel injector, a reinforced crankcase, and an updated exhaust system.

In 2015, Tata showcased a 1.2-liter, 3-cylinder naturally-aspirated version, later used in the Tiago and Tigor. It offered a dual overhead camshaft driven by a timing chain, variable valve timing, exhaust gas recirculation, a variable oil pump, and four valves per cylinder with hydraulic adjusters.

A turbocharged 1.2-liter, 3-cylinder variant debuted in 2017 with the Nexon, adding a turbocharger and intercooler. Despite competitors using direct injection, it retained multi-point fuel injection, producing 110 hp (81 kW) and 130 lb⋅ft (170 N⋅m).

A more powerful version, offering 120 hp (88 kW), arrived in 2020 with the BS6-compliant Nexon facelift, still using multi-point fuel injection.

In January 2021, Tata launched a turbocharged Revotron engine for the Altroz iTurbo variant, delivering 110 hp (81 kW) and 100 lb⋅ft (140 N⋅m).^[2] The lower output aimed to distinguish it from the Nexon and address fitment issues with the Nexon’s larger 6-speed manual transmission.

In January 2022, Tata introduced CNG variants for the Tiago and Tigor, branded as iCNG, marking the company's first cars with this fuel option.^[3] This engine produces 72.5 hp (54.1 kW) and 70 lb⋅ft (95 N⋅m) of torque, paired with a 5-speed manual gearbox, and can start directly in CNG mode, a unique feature.^[4] The Punch and Altroz later received iCNG versions.

In January 2023, Tata unveiled the Altroz Racer, a sportier version with the same 120 hp (88 kW) as the Nexon, enabled by a 6-speed manual gearbox.^[5] Production was confirmed, potentially replacing the slower-selling iTurbo.^{[needs update]}

Applications

Applications of the Revotron engine include:

• Tata Bolt (2014-2019)
• Tata Zest (2014-2019)
• Tata Tiago (2016-present)
• Tata Tigor (2016-present)
• Tata Altroz (2019-present, non-turbo / 2021-present, turbo)
• Tata Nexon (2017-2020, 110 PS turbo / 2020-present, 120PS turbo)
• Tata Punch (2021-present)

See also

• Tata Motors
• List of Ford engines