Breakfast conversation

This morning the kids are sitting next to each other with their cereal bowls. Greg's July issue of Car and Driver magazine is on the table. The cover has a picture of a silver Mustang GT, silver Chevy Camaro SS, and a red Dodge Challenger R/T. David slides it infront of himself and Rachel and here's the conversation:
David: (Pointing to the Mustang) This car is faster than Daddy's. Rachel. Rachel. Rachel! This car is faster than Daddy's.
Rachel: That car? No. It is not faster than Daddy's car. David these 3 cars are slower than Daddy's car.
David: (Leaning over the magazine, and pointing to the red Challenger) Ok, then this red car is the fastest. It's faster than Daddy's car.
Rachel: No. No. No. The red car is slow. It just looks fast but it's not.
David: Rachel!!!!
Rachel: David, listen. Daddy's car has more horsepower than these 3 cars. It's fastest because it has a lot of horsepower.
David: Ohhhhhh. Ok. Daddy's car costs lots of money. It's the biggest horsepower.
Rachel: David, listen. Daddy's car is the best value. It is not that expensive but it has the most horsepower of all the cars in this magazine.