We counted 13 buttons on the steering wheel, plus the paddle shifters for the transmission mounted on the column. The spokes hold cruise control and stereo buttons, while two sets of voice command buttons sit below the left spoke.
Acura uses a big dial/joystick to control the software interface on the LCD. Although that part works well enough, the software interface on the screen is not always intuitive. A stereo with a six-CD changer sits at the bottom of the stack.
We generally like the voice command system in the RDX. It uses fairly intuitive commands and does a very good job of recognizing speech. Unfortunately, it has two disparate systems, one for cell phones and one for car and navigation functions.
The RDX's stereo can read MP3 and WMA discs, but the CD interface isn't great. It's often difficult to know whether you should turn the dial or use the joystick, and the system doesn't display ID3 tagging information.
This engine uses the first turbo that Acura developed for a production car. It makes the car very peppy, with little turbo lag. Although it allowed Acura to use a lighter weight, four cylinder engine, rather than a six cylinder, it doesn't produce particularly good mileage. It's EPA rating is 19mpg city and 23mpg highway.