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What is the RPM for an automatic transmission engine?

2 Answers

LydiaLee

07/24/25 10:55pm

Automatic transmission engine RPM ranges from 1800 to 2000. The steps to start an automatic transmission vehicle are: 1. Insert the key and turn it to the second ignition position (power mode), then wait for the system self-check to complete; 2. Shift the gear lever from P to N; 3. Release the brake and start the vehicle's engine; 4. Press the brake pedal with your foot, shift the gear lever from N to D, release the brake, and press the accelerator to start moving. Engine maintenance methods include: 1. Use qualified engine oil; 2. Use qualified coolant; 3. Regularly clean the radiator scale; 4. Regularly remove carbon deposits from the engine; 5. Replace the air filter, oil filter, and fuel filter on time; 6. Check the condition of the spark plugs; 7. Maintain normal RPM.

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Jessie

08/10/25 3:11pm

I think the RPM of an automatic transmission engine isn't a fixed value—it depends on many factors, such as how deep you press the accelerator, the vehicle speed, and the car's own design. When driving slowly in the city, the RPM usually stays between 1,000 and 2,000 per minute, like idling at 700–800 RPM when waiting at a red light. If you accelerate by pressing the throttle, the RPM can rise above 3,000, but during steady cruising on flat roads, it stabilizes around 2,000 RPM. This all depends on how the automatic transmission shifts gears—the computer automatically adjusts the RPM based on engine load, speed, and driving mode to save fuel and improve efficiency. Different cars also vary; for example, an SUV climbing a slope may need higher RPMs to maintain power, possibly exceeding 3,000 RPM. Overall, in daily driving, you can observe the tachometer more and drive gently—keeping it below 2,000 RPM can save a lot of fuel and reduce engine wear.

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