Richard Korbitz, who had produced the film version of Stephen King's novel "Salem's Lot", was given some new unpublished manuscripts from Stephen King to consider for their next film adaptation. One was "Christine" and the other was "Cujo". Korbitz chose Christine because he thought Cujo was too silly - seems like he was the silly one as Cujo was a much better movie.
Pay attention to the background when Arnie first brings Christine to Darnell's Garage. As he's walking back to Dennis's car to ask him to honk his horn, you can see the bulldozer in the background that will be used to destroy Christine.
In the book, Christine is a four-door - obviously not a Fury, as that model was only offered as a two-door coupe in 1958. Of course, no self-respecting '60's, '70's or '80's teenager would be caught dead in a "Mom's car" four-door ..
Although it is sometimes reported that John is the son of legendary character actor Dean Stockwell (Dune; Quantum Leap; Stargate SG-1), John Stockwell and Dean Stockwell are not related as John's birth name is actually John Stockwell Samuels IV and his dad was an attorney.
There is a rumor that James Dean's prized Porsche was a real-life Christine. After the fatal wreck that killed Dean, the parts were sold. Legend has it that some people who bought the parts were later killed in automobile-related accidents.
Christine's famous license plate is different from the book to the movie.
The book says on page 181 chapter 20 that Arnie Cunningham registered the car in Pennsylvania. Also the book's time frame is in the winter and mentions snow on a daily basis, where in the movie snow is never present.
In the movie Dennis and Leigh use a bulldozer to battle Christine. In the book Dennis uses a pink septic/sewer truck named "Petunia" to destroy Christine.
In the book Arnie stores his car at an airport parking lot, this is where it gets vandalized, in the movie it gets vandalized is Darnell's garage.
In the book Darnell was killed in his living room not in Christine at the garage.
In the book Christine was bought Buckskin Beige by Rolland Lebay and he had it painted "Autumn Red" not Ford Red. The movie shows Christine red from the assembly line.