The Infiniti Q70 is essentially a renamed M model, given some small updates for the 2015 model year.
The largest literal change is the addition of this long-wheelbase version, which adds 6 inches to the overall length.
This 5.6-liter V-8 engine carries over from the M56 model, making 416 horsepower and 414 pound-feet of torque.
An all-wheel-drive option, included on this example, is available. The system is completely automatic and designed to enhance traction.
Infiniti retains a fixed suspension, which lacks the ride quality of luxury competitors.
The trunk if of moderate size for a big sedan, with 14.9 cubic feet of space.
As Infiniti's biggest sedan, the cabin is designed for comfort and style.
Rear-seat passengers gain 5.5 inches of legroom in the long-wheelbase version.
This cabin design carries over from its M model predecessor.
The Q7o's steering system features enough boost to make maneuvering this big sedan easy.
A button on the right steering wheel spoke enables Distance Control Assist, a feature which automatically applies the brake when there is stopped traffic ahead.
Infiniti's instrument cluster only offers a very small information display.
The seven-speed transmission features a manual shift position.
The head unit software is a bit dated, first appearing five years ago.
A new destination feature is Connected Search, using the car's data connection to look for local businesses.
The Q70 L also features a telematics system, letting drivers access car functions from a smartphone app.
The hands-free phone system includes phone book synchronization.
The music library screen is functional, if not stylish.
Audio sources for the Q70 L include Bluetooth streaming, iOS integration and USB drive.
The 16-speaker Bose audio system comes with four speakers mounted on the shoulders of the front seats.