Originally Posted by car and driver

Further complicating things is the designation of our test car: Type RA Spec C. RA stands for "Rally Applicant." It's a car intended to go racing and is, therefore, stripped of luxuries such as a sound system of any kind, air conditioning, power windows, trunk trim, airbags, underbody coating, and other things—all in the name of weight reduction. It also has an adjustable center differential that can be locked from the cockpit and a roof vent that opens manually—as on rally racers. The hood and roof metal is thinner, and so is the car's glass. It has a quicker steering ratio. And remember that the test car shown here is not the version to be sold in the States.