Your favorite rock song about cars?

Rush, Red Barchetta.

Radar Love                

Yes, it's a cover:

https://www.youtube.com/watch?v=ZJJvyPXPssg

Answer to question 1:

LITTLE RED CORVETTE by Prince

LOW RIDER by War

I CAN'T DRIVE 55 by Sammy Hagar

MUSTANG SALLY

Answer to follow-up question:

1. The right combination of lyrics and melody are what make a great song. My pet peeve, when it comes to a song, is lack of variety in lyrics/repetition of the SAME lyrics. With over 50,000 words to choose from - some lyricist could really stand to be more creative. 

So, to answer your second question: I rather have a song with a good melody and varied lyrics (even if it's about an electric car or nonsensical lyrics), over a song of substance that has limited/repetitious lyrics.

2. And, think it would be helpful if the electric car that is being sung about is slightly cooler than a Prius - such as a Tesla or BMW.

So yes, I think it's totally possible to have a good song about an electric car.

Aside from the obvious choices. 

The Jimi Hendrix Experience - Highway Chile 

The Doors - Cars Hiss By My Window

Horslips - Motorway Madness 

Motörhead - Riding With The Driver

Mahogany Rush - Finish Line

Hawkwind - Motorway City 

Scorpions - Rock My Car 

Sammy Hagar - Trans Am

Badlands - Hard Driver 

King Kobra - Mean Street Machine

Fu Manchu - Redline 

Truly - Blue Flame Ford 

Hardline - Rhythm From A Red Car 

Local H - BMW Man 

As for Electric cars? It's possible, though it'd probably be either on the "Silent but Deadly" or tech related kind of vibe. Though you'd want to be quite a Petrolhead, or in this case a Motorhead. To come up with a tune that doesn't come across as a try-hard. Still you never know. 

Mott The Hoople - I'm A Cadillac / El Camino Dolo Roso 

https://youtu.be/XnCEi1xI-wY

It's possible to write a song about whatever you desire to. No one tell if a song will be good or not. Good is relative. What's good to you may not be good to another person.

Rory Gallagher - "Souped-Up Ford"

Electric cars? Well maybe a Tesla.

Love Janis and Highway Star is a good song too. I think I have to go with two Springsteen songs. Cadillac Ranch and Ramrod.

Five-O-Ford

https://www.youtube.com/watch?v=k9UF33CSiTA