Some auto enthusiasts, accustomed to V-8 power, quibble whether a 3.6-liter, double overhead cam V-6 is enough for the XTS. But the test XTS performed so well on city streets and highways, with power coming on so smoothly, transmission shifts weren't noticed. Neither was the lack of a V-8.
Torque in the XTS doesn't peak to 264 foot-pounds until 5,200 rpm, so low-end grunt isn't sports car-like.
But the direct gasoline injection of the engine gave the test XTS a lot of energetic power, and 0 to 60 miles per hour is estimated at a decent 6.5 seconds.
Thanks to all-wheel drive on the test car, engine power got to the wheels and readily got the car going, even during rainy downpours.
The V-6 resulted in surprisingly good gasoline mileage. On a 700-mile, mostly highway trip, this large sedan averaged 24.9 miles per gallon.
Note the 4,215-pound, all-wheel drive XTS is rated by the federal government at 17 mpg in the city and 26 mpg on the highway while a front-wheel drive XTS is rated at 17/28 mpg.
In contrast, the 2013 Lincoln MKS is rated at a similar 18/27 mpg as a front-wheel drive car.
A nice perk for the XTS owner: The car uses regular unleaded, not the more pricey premium gasoline that many luxury cars require.
A couple of nits: The 18-cubic-foot trunk looks impressive, but the opening is pinched by the sloping back window and much of the space is under this rear window, so upright items can be problematic. At least Cadillac provides 60/40 split folding rear seatbacks so tall things can slide through on their sides.
And, the glovebox lid in the test car always looked like it was ajar and crooked on the right side, even when it was latched.
A word of caution: The bright-colored multi displays in the XTS can be distracting, and less-than-immediate response to touches of the Cue display screen can make early working of Cue confusing.
And turned off, the display screen shows off all the fingerprints it collected.
More than 12,600 XTS cars were recalled in October because, after folding forward, the rear-seat head restraints might not lock in place in the upright position. This could result in a neck injury in a crash.