The one place that the Bentley unarguably trounces the Rolls is in the engine room.
The Mulsanne's 6.75-liter twin-turbocharged V8 outputs 505-horsepower and a massive 752 pound-feet of torque, substantially more than the Phantom's naturally aspirated V12's 453 horsepower and 531 pound-feet of twist.
The Bentley's dash is covered in wood veneer, leather, and polished metal. Glossy plastic buttons seem far too high-class for greasy journalist fingers. Meanwhile, the 8-inch LCD screen hides behind a motorized faceplate.
Here's a feature that we love. In the center of the dash is a leather-lined MP3 player drawer. Inside this drawer is what appears to be a Audi's proprietary Music Interface connection, which features dongles for iPod sync cable, USB pigtail, or auxiliary analog input.
While we're happy that we don't need to reach to connect our iPods, users who swap CDs often may be disappointed. The Mulsanne relocates the rest of its media inputs to the glove compartment, way on the other side of the cab. Here we find a single DVD slot, a six-disc CD changer, two SD card slots for media, and a SIM card slot.
The Mulsanne's interface and controller appear to be reskinned versions of Audi's new MMI interface, which is much better than the Phantom's reskinned old-iDrive system. Bentley's navigation system is based on a 40 GB hard drive, which should offer storage for ripped audio.
If you were wondering why the Bentley had a SIM card slot in its glove box, it's because the Mulsanne can be equipped with a wired handset. The system also features Bluetooth wireless and hands-free calling, if you don't want your car to have its own phone number.