Tata Revotron — engine review
Tata 1.2 Revotron (86 HP) engine: Experiences, issues, fuel consumption and used car buying tips
Key points (TL;DR)
- Compact and simple: Three-cylinder naturally aspirated engine without a turbo, designed primarily for city driving.
- Economy first: Factory iCNG (CNG) versions are available, which drastically reduce running costs.
- Cheap maintenance: No dual-mass flywheel, no DPF filter, and no complicated turbo systems. Clutch kits are affordable.
- Driving drawbacks: Noticeable noise and vibration levels (a typical three-cylinder trait), as well as lack of punch on inclines and during overtaking.
- Transmissions: The manual gearbox is a reliable and safe option, while the AMT (automated manual) can be jerky and more expensive to repair when the actuators fail.
- Not for highways: Due to short gear ratios and low torque, at 130 km/h the revs are high and fuel consumption goes up.
Contents
- Introduction: What does the 1.2 Revotron offer?
- Technical specifications
- Reliability, maintenance and common failures
- Specific parts and costs
- Fuel consumption and real-world performance
- LPG/CNG and tuning options
- Gearbox and power delivery
- Buying used and final verdict
Introduction: What does the 1.2 Revotron offer?
The 1.2 Revotron engine (with 86 HP and 113 Nm of torque) is the backbone of the lineup in compact Tata Motors models such as the Punch, Tiago, Tiago NRG and Tigor (including facelift versions from 2020 onwards). It is a three-cylinder naturally aspirated petrol engine created with one main goal: reliable everyday mobility with low maintenance costs. Do not expect sporty performance from this engine; it is built for longevity and robustness, offering proven technology that is easy to work on for the average mechanic anywhere in the world.
Technical specifications
| Specification | Data |
|---|---|
| Engine displacement | 1199 cc |
| Engine power | 63 kW (86 HP) / 54 kW (73 HP) in iCNG mode |
| Torque | 113 Nm / 95 Nm in iCNG mode |
| Engine code | Revotron 1.2 NA (Depends on series/market) |
| Number of cylinders | 3 |
| Injection type | MPFI (Multi-point fuel injection) |
| Induction system | Naturally aspirated (No turbo) |
Reliability, maintenance and common failures
Timing system and major service
Unlike some modern engines that rely on a timing chain, the 1.2 Revotron uses a classic timing belt. Although some drivers prefer a chain, thinking it lasts forever, the belt on this engine actually makes maintenance cheaper and runs more quietly. The major service (replacement of timing belt, tensioner, idler pulleys and water pump) is ideally done at around 90,000 to 100,000 km or every 5 years. If the vehicle is mostly used in harsh urban conditions with a lot of idling, it is recommended to shorten this interval.
Lubrication and oil consumption
The oil sump capacity is modest and the engine takes about 3.2 to 3.5 litres of oil. It is recommended to use quality synthetic oil of 5W-30 grade. As for oil consumption, the naturally aspirated Revotron is not known as a problematic oil burner. Normal consumption is considered to be up to 0.2 litres per 1000 km on higher-mileage vehicles. If you notice that it is using more than that, first check the valve cover, as the gasket tends to harden over time and oil starts to “sweat” down the engine block.
Ignition and early issues
Since this is a conventional petrol engine, the condition of the spark plugs is crucial for smooth running. It is recommended to replace the spark plugs every 30,000 to 40,000 km. If you drive an iCNG (CNG) version, the interval must be shortened, as gas requires a stronger spark and wears out the electrodes faster. One of the most common issues owners face are ignition coils. Symptoms of a failing coil include rough idle, jerking when you press the accelerator and the “Check Engine” light coming on due to misfires. Also, because of the three-cylinder configuration, the engine naturally generates more vibration, so the engine mounts tend to wear out earlier than on four-cylinder units. A clear sign they need replacing are strong vibrations transmitted to the steering wheel and cabin while the car is stationary.
Specific parts and costs
Fuel injection and emissions
The injection system is the tried-and-tested MPFI (Multi-point fuel injection). Unlike modern engines with direct injection, here the injectors operate at lower pressure and spray fuel into the intake manifold. They are very durable and rarely cause problems. Clogging occurs only if you regularly fill up with very dirty fuel or if the car is constantly driven “on reserve”, drawing sediment from the bottom of the tank.
Good news for your wallet: this engine is completely free of complex emission-control components typical of diesels. No DPF filter, no AdBlue system and no turbocharger (naturally aspirated air intake). All of this immediately eliminates the possibility of repairs that on some cars cost as much as half the vehicle.
Fuel consumption and real-world performance
City traffic vs. open road
This engine really shines in city conditions. Thanks to its small displacement, real-world city fuel consumption is between 6.5 and 7.5 l/100 km. However, considering the weight of models such as the Tata Punch, the 86 HP and 113 Nm setup becomes a slightly “lazy” option. To get the most out of it when overtaking, you will have to shift down and rev the engine higher. Things get even more tense in summer – when you turn on the air conditioning, you will clearly feel the drop in power.
Highway cruising
This is definitely not a cruiser for long motorway journeys. At 130 km/h on the highway the engine spins at quite high revs (often over 3500 rpm), which makes it very noisy in the cabin. Due to the high revs, fuel efficiency also disappears, so motorway consumption easily goes over 7 l/100 km. You can clearly feel that it is missing a sixth gear and more power for smooth high-speed overtakes.
LPG/CNG and tuning options
Gas conversion: A perfect match
If there is an engine that is made to run on gas, it is this one. Tata is well aware of that, which is why Tiago and Tigor models are offered with a factory-integrated iCNG system. When running on CNG, power drops to 73 HP (95 Nm of torque), but running costs become so low that this power loss is very easy to forgive. If you have a pure petrol version, retrofitting a sequential LPG system is a safe and routine job for any competent workshop. Just make sure to check valve clearances more often and replace spark plugs regularly.
Should you “chip tune” the naturally aspirated 1.2?
Plain and simple: No. Installing a “Stage 1” remap on non-turbo engines is basically throwing money away. You will gain barely 3 to 5 HP, which you will not even feel, and you may upset the ignition map. Keep the factory software.
Gearbox and power delivery
Clutch and flywheel
No need to worry, the 1.2 Revotron does not have a dual-mass flywheel. It uses a conventional solid flywheel. This means that clutch replacement is drastically cheaper compared to modern turbo diesels. Price of a clutch kit plus labour: Not expensive (Depends on the market).
Manual or Automatic (AMT)?
Here we come to the key dilemma. The models are offered with a 5-speed manual gearbox or a 5-speed AMT (Automated Manual Transmission).
The manual gearbox is robust and forgiving. The only “issue” owners complain about is occasional difficulty engaging reverse (which is solved by pressing the clutch again). The recommended oil change interval for the manual gearbox is every 60,000 km.
The AMT gearbox is essentially a manual gearbox with robotic actuators that change gears for you. Its biggest drawbacks are sluggishness and “jerkiness” in stop-and-go city traffic. In addition, the actuators and electronics tend to fail over time, and the clutch disc wears out faster because the electronics cannot always perfectly judge the point of clutch slip. Repairing AMT actuators can be very expensive (Depends on the market).
Buying used and final verdict
What to check before you hand over the money?
When buying a used car with the 1.2 Revotron engine, pay attention to the following:
- Cold start: Ask the seller not to start the car before you arrive. When starting from cold, listen to whether the engine runs smoothly. Any squealing may indicate a worn belt or pulleys.
- Vibrations in the steering wheel: If they are excessive while you are standing at a traffic light, be prepared to replace the engine mounts.
- Clutch condition on AMT models: If the car “jumps” and jerks when you gently press the accelerator from a standstill, it means the clutch is worn or the gearbox software needs serious calibration.
- Service history: Since the engine runs perfectly when regularly maintained, a proper service record (especially for oil changes and the major service) is crucial.
Who is this car for?
The 1.2 Revotron engine is an excellent choice for drivers who want a reliable and above all cheap means of transport in urban areas. It is an ideal purchase for beginners, families who need a “second” city car, and taxi drivers who use iCNG versions to maximise profit per kilometre. On the other hand, if your daily route includes hundreds of kilometres of motorway driving, constant overtaking, or if you are bothered by the rougher sound of a three-cylinder and slow AMT gearboxes, this engine is not for you and you should look for something more powerful and refined.
