When it says Challenger or equivalent, what is the equivalent? and can I add my girlfriend as a driver as well?

Equivalent means that if you do not have a challenger available, you get the sports they have, happened to me and I was told that a Camaro, and your girlfriend if you can handle if you add as additional driver.

Can add another driver , it doesn't cost much . Camero and mustang are not equivalent to a challenger. Challenger is the top class . When I went in September. The equivalent was Corvette .

As long as you both have driving licences they should let you both drive they did with us we got offered a different car there was 8 of us we paid for everything then when we took car back they took over 1000 pound out of bank account so be wary other than that have a great holiday

A vehicle which is similar in size, but not that make. And you can add your girlfriend to that too?

Something equal to a Challenger, can be a Charger or Camaro. Go to Cost more if includes someone and insurance too.