Q8 vs XT5
Same class, different makers. The Q8 (Audi) and the XT5 (Cadillac) are built for the same kind of buyer. Here the verdict on paper is fairly clear. The Q8 takes 2 of 4 areas against the XT5, starting with engine & performance.
At a glance
- Engine & Performance Q8 wins
- Fuel Economy & Range XT5 wins
- Space & Practicality Tie
- Off-road & Towing Q8 wins
- Engine & Performance2.6
- Fuel Economy & Range5.9
- Off-road & Towing9.3
- Engine & Performance0.0
- Fuel Economy & Range9.2
- Off-road & Towing3.3
Spec scores (0 to 10) are calculated from manufacturer specs against other models in the same class. See how the formula works. They are not reviews or user ratings.
Key Differences
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The Q8 has 100 hp more power
It’s a lopsided result (335 hp for the Q8, 235 hp for the XT5) and one of the main reasons to choose between them. More power helps with merging, overtaking and climbing hills, especially with passengers and luggage on board.
-
The XT5 has better fuel economy
The spread here is large: 24 mpg on the XT5 versus 19 mpg on the Q8. Expect to notice it. Better combined fuel economy lowers your running costs every week, and the savings add up over years of ownership.
-
The Q8 has 4,200 lb more towing capacity
Of all the specs we compared, this is one where the Q8 makes its strongest case: 7,700 lb against 3,500 lb. If you tow regularly, the Q8’s higher rating gives you more margin.
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The Q8 has 111 lb-ft more torque
The Q8 clearly leads on torque, and 369 lb-ft versus 258 lb-ft is a difference that reaches well beyond the spec sheet. More torque means stronger pulling from low speeds, which you feel when accelerating from a stop or climbing grades.
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The XT5 has better city fuel economy
On fuel economy (city), the XT5 posts 22 mpg against 17 mpg for the Q8, a gap big enough to feel in everyday use. In town, driving style has a big effect, but the XT5 starts from a better baseline.
Design & Size
Dimensions
| Spec | Q8 | XT5 |
|---|---|---|
| Length | N/A (not specified) | 189.6 in |
| Width (no mirrors) | N/A (not specified) | 74.9 in |
| Wheelbase | N/A (not specified) | 112.5 in |
Engine & Performance
Q8 leads
The XT5 is outclassed on engine & performance; the Q8 leads by a clear margin. The Q8 adds 100 hp more power. Power is only part of the story; weight, gearing and torque delivery shape how quick a car feels. Bottom line for engine & performance: the Q8 has the edge.
Total system output
Q8: 335 hp XT5: 235 hp The Q8’s extra output gives it more in reserve when you need to get up to speed.
Torque
Q8: 369 lb-ft XT5: 258 lb-ft The Q8’s extra torque makes it more relaxed when fully loaded or towing.
Fuel Economy & Range
XT5 leads
The XT5 wins the fuel economy & range section decisively. Point to the XT5 for better fuel economy. The XT5 uses less fuel on the standard combined cycle, which matters most if you drive a lot. The fuel economy & range verdict goes to the XT5.
Fuel economy (combined)
Q8: 19 mpg XT5: 24 mpg Official figures rarely match real-world driving exactly, but the ranking between two cars tends to hold.
Fuel economy (city)
Q8: 17 mpg XT5: 22 mpg Hybrids often shine in the city, and the XT5 has the better rating here.
Space & Practicality
Too close to call
In the space & practicality category, the Q8 and the XT5 land in almost the same place. In short, space & practicality is a draw; the decision lies elsewhere.
Off-road & Towing
Q8 leads
The off-road & towing numbers point firmly in one direction: toward the Q8. On the Q8, you get 4,200 lb more towing capacity. A higher towing capacity lets you pull bigger trailers, boats and campers. That makes the Q8 the natural choice for buyers focused on off-road & towing.
Max towing
Q8: 7,700 lb XT5: 3,500 lb Towing ratings depend on configuration and equipment, so check the exact trim you’re looking at.
Safety & Tech
For safety & tech, the differences are in the specifics (component names and types), so the table is the place to look.
Full Specifications
Engine & Performance
| Spec | Q8 | XT5 |
|---|---|---|
| Powertrain | Gas (48V mild hybrid) | Gas |
| Engine | 3.0L turbo V6 | 2.0L turbo I4 |
| Total system output | 335 hp (winner) | 235 hp |
| Torque | 369 lb-ft (winner) | 258 lb-ft |
| Transmission | 8-speed automatic | 9-speed automatic |
| Drivetrain | AWD (quattro) | FWD (AWD available) |
Fuel Economy & Range
| Spec | Q8 | XT5 |
|---|---|---|
| Fuel economy (combined)EPA estimate where available | 19 mpg | 24 mpg (winner) |
| Fuel economy (city) | 17 mpg | 22 mpg (winner) |
| Fuel economy (highway) | 23 mpg | 29 mpg (winner) |
Space & Practicality
| Spec | Q8 | XT5 |
|---|---|---|
| Seats | 5 seats | 5 seats |
| Cargo (behind rear seats) | N/A (not specified) | 30 cu ft |
| Cargo (seats folded) | N/A (not specified) | 63 cu ft |
Off-road & Towing
| Spec | Q8 | XT5 |
|---|---|---|
| Max towing | 7,700 lb (winner) | 3,500 lb |
| AWD / 4WD available | Yes | Yes |
Safety & Tech
| Spec | Q8 | XT5 |
|---|---|---|
| Basic warranty | 4 yr / 50,000 mi | 4 yr / 50,000 mi |
Dimensions
| Spec | Q8 | XT5 |
|---|---|---|
| Length | N/A (not specified) | 189.6 in |
| Width (no mirrors) | N/A (not specified) | 74.9 in |
| Wheelbase | N/A (not specified) | 112.5 in |
Price
| Spec | Q8 | XT5 |
|---|---|---|
| Starting MSRP | N/A (not specified) | $44,295 Lowest price in class |
“N/A” means the manufacturer does not specify the value or we could not confirm it. Figures marked “manufacturer rating” are the maker’s own claims, not our measurements.
Which One Should You Buy?
Choose the Q8 if…
- you merge, overtake or climb hills with a full load (335 hp vs 235 hp)
- you want the higher towing capacity (7,700 lb vs 3,500 lb)
- you want more pulling power from low speeds (369 lb-ft vs 258 lb-ft of torque)
Choose the XT5 if…
- you want better combined fuel economy (24 mpg vs 19 mpg)
- you want better city fuel economy (22 mpg vs 17 mpg)
- you cover long highway distances (29 mpg vs 23 mpg on the highway)
Also Compared
Frequently Asked Questions
Which is better for most people, the Q8 or the XT5?
For most people, the Q8 is the stronger choice, unless you need better fuel economy, which only the XT5 offers.
Executive Summary
Two companies, two answers to the same question. That’s how I see the Q8 from Audi and the XT5 from Cadillac. For me, the deciding factor is that only the Q8 gives you 100 hp more power. It also helps that the Q8 has 4,200 lb more towing capacity. I’ll admit the XT5 has a point with better fuel economy.
Choose by what you’d use most: engine & performance leads to the Q8, fuel economy & range leads to the XT5.
My pick: the Q8, unless having better fuel economy matters more to you than the rest.
Personal opinion based on the data above. Your priorities may differ.