What is the appropriate engine speed for a car?

[AaronLee]

An engine speed of around 2200-2500 rpm is considered appropriate. More details about engine speed are as follows: 1. Low speed: When the engine operates below 2000 rpm while driving, it may feel underpowered. A heavy load at low engine speeds can cause damage to the engine and easily lead to carbon buildup. 2. High speed: When the engine operates above 4000 rpm, the combustion time shortens, leading to incomplete fuel combustion and a significant increase in fuel consumption. 3. Normal speed: With the engine in good condition, fuel consumption decreases, carbon buildup reduces, and damage to the engine is significantly minimized.

[StCaleb]

I've been driving for over a decade, and this issue really depends on specific circumstances. For normal city driving, keeping the RPM between 1,500 and 2,500 is ideal - the car runs fuel-efficiently without shaking. In stop-and-go traffic, lower RPM around 1,000 is acceptable. On highways, smaller displacement vehicles typically operate at 2,500-3,000 RPM, while larger engines may only need around 2,000 RPM. The key is listening to the engine - if it's excessively roaring or the car starts jerking, the RPM isn't right. Higher RPM during cold starts is normal until the engine warms up. Just remember to avoid frequently redlining the tachometer, as it severely damages the engine.

[DelJayla]

Honestly, the appropriate RPM depends a lot on your driving habits and the condition of your car. I've found that keeping the RPM around 2000 when driving gently is particularly fuel-efficient, but if you want to overtake, stepping on the throttle to over 3000 RPM is fine. When starting a cold engine, the RPM may jump to nearly 2000, but it should drop to around 700-800 once the engine warms up. The RPM will be slightly higher than usual when using the air conditioning or climbing hills, which is normal. A common mistake beginners make is keeping the RPM too low, causing the engine to shake and leading to carbon buildup. I recommend getting a heads-up display so you can monitor RPM changes without looking down. Over time, you'll naturally get the hang of it.

[Pat]

I think the ideal RPM depends on the car model. My 1.6L naturally aspirated car feels most comfortable cruising around 2,000 RPM, and remains stable even at 3,000 RPM on highways. With automatic transmissions, there's no need to overthink RPMs since the computer handles it - I just avoid sustained hard acceleration. For manual shifting, changing gears between 2,000-2,500 RPM is optimal, with post-shift RPM dropping to around 1,500 before accelerating again. Prolonged low-RPM driving can cause throttle body carbon buildup, so I make a monthly highway run to burn off deposits at higher revs. The tachometer is just a reference - pay more attention to vibrations and engine sounds. Experience will teach you the sweet spots.

[DeAddyson]

When it comes to engine RPM, based on my observation and experience, a stable idle speed around 800 RPM indicates good vehicle condition. For daily driving, maintaining RPM between 1500 and 2500 is optimal, providing sufficient power while being fuel-efficient. When climbing hills or overtaking requires more power, revving up to 4000 RPM is perfectly fine. One thing to watch out for in the long run is avoiding frequent operation below 1000 RPM, as it can lead to stalling and damage the transmission. My car has an instant fuel consumption display, and I've noticed that fuel efficiency is highest around 1500 RPM. For automatic transmissions, the computer controls RPM quite intelligently, whereas with manual transmissions, it's up to the driver to manage it.

[LaMarcus]

Whether the engine speed is appropriate depends on where and how you drive. During my daily commute, I usually keep it around 2000 RPM, and when cruising at 120 km/h on the highway, the speed is about 2800 RPM. At cold start, the RPM is a bit higher, around 1500, but it drops after about a minute as the engine warms up. The worst thing for a car is driving at low speed in a high gear with too low RPM, as the engine struggles and over time, repair costs can exceed any fuel savings. I remember when I went to the plateau last time, at 3000 meters altitude, the engine speed automatically increased by 200 RPM, and the turbo lag even decreased. Actually, listening to the engine sound is the most straightforward way to tell—light and smooth humming means the RPM is just right, but if the engine sounds labored, it's time to downshift.