Hi and Welcome,

On the Altima hybrid, when the regular engine comes on, you feel it slightly. This is normal and you will notice it more when the car is cold.

If you consider how loud a normal car is when starting, however, you might be amazed how quiet the NAH actually is. No starter is a help, but the starter is only part of the noise one hears on a normal car start-up. Backing out without turning on the engine and then having it come to life while I'm accelerating freaks my Father-in-law out every time he rides in our car, but I'm used to it now.

My problem is after I drive the NAH and then go back to my other car, I get worried about all the sounds I constantly hear on my normal Honda Civic.