Q8 vs X5
It’s Audi against BMW in the midsize luxury suv class, and the Q8 and the X5 are the models carrying each flag. This one has a front-runner. The X5 wins 2 of 4 compared areas, and fuel economy & range is where the difference is hardest to miss.
At a glance
- Engine & Performance X5 wins
- Fuel Economy & Range X5 wins
- Space & Practicality Tie
- Off-road & Towing Tie
- Engine & Performance2.6
- Fuel Economy & Range5.9
- Off-road & Towing9.3
- Engine & Performance3.5
- Fuel Economy & Range9.4
- Off-road & Towing8.6
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 X5 has better fuel economy
For fuel economy (combined), the X5 leads by a wide margin: 25 mpg versus 19 mpg. Official figures rarely match real-world driving exactly, but the ranking between two cars tends to hold.
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The X5 has 40 hp more power
The Q8 comes close with 335 hp; the X5 does slightly better with 375 hp. Power is only part of the story; weight, gearing and torque delivery shape how quick a car feels.
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The X5 has better city fuel economy
This is a headline difference. With 23 mpg to the Q8’s 17 mpg, the X5 has a lead that’s easy to see on paper and in practice. City fuel economy matters most if your driving is mostly short trips, traffic and stop-and-go commutes.
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The X5 has better highway fuel economy
Put simply, the X5 is far ahead here: 27 mpg compared with 23 mpg. Highway fuel economy matters if you cover long distances at steady speeds.
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The X5 has 29 lb-ft more torque
Think of it as a tiebreaker rather than a deal-breaker: 398 lb-ft for the X5, 369 lb-ft for the Q8. More torque means stronger pulling from low speeds, which you feel when accelerating from a stop or climbing grades.
Design & Size
Engine & Performance
X5 leads
The X5 is the clear pick if engine & performance is what you care about most. The X5 scores with 40 hp more power. More power helps with merging, overtaking and climbing hills, especially with passengers and luggage on board. In short, the X5 is the better-equipped car for engine & performance.
Total system output
Q8: 335 hp X5: 375 hp The X5’s extra output gives it more in reserve when you need to get up to speed.
Torque
Q8: 369 lb-ft X5: 398 lb-ft The X5’s extra torque makes it more relaxed when fully loaded or towing.
Fuel Economy & Range
X5 leads
This section belongs to the X5. In fuel economy & range, it leads the Q8 by a margin that’s hard to ignore. The X5 gives you better fuel economy. Better combined fuel economy lowers your running costs every week, and the savings add up over years of ownership. So if fuel economy & range tops your list, lean toward the X5.
Fuel economy (combined)
Q8: 19 mpg X5: 25 mpg The X5 uses less fuel on the standard combined cycle, which matters most if you drive a lot.
Fuel economy (city)
Q8: 17 mpg X5: 23 mpg Hybrids often shine in the city, and the X5 has the better rating here.
Space & Practicality
Too close to call
If space & practicality matters most to you, this section won’t make the decision for you: they’re level. Treat space & practicality as common ground and look elsewhere for the deciding factor.
Off-road & Towing
Too close to call
The off-road & towing specs are close enough that neither gets the point. For off-road & towing, pick whichever you prefer for other reasons.
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 | X5 |
|---|---|---|
| Powertrain | Gas (48V mild hybrid) | Gas (48V mild hybrid) |
| Engine | 3.0L turbo V6 | 3.0L turbo I6 |
| Total system output | 335 hp | 375 hp (winner) |
| Torque | 369 lb-ft | 398 lb-ft (winner) |
| Transmission | 8-speed automatic | 8-speed automatic |
| Drivetrain | AWD (quattro) | RWD (xDrive AWD available) |
Fuel Economy & Range
| Spec | Q8 | X5 |
|---|---|---|
| Fuel economy (combined)EPA estimate where available | 19 mpg | 25 mpg (winner) |
| Fuel economy (city) | 17 mpg | 23 mpg (winner) |
| Fuel economy (highway) | 23 mpg | 27 mpg (winner) |
Space & Practicality
| Spec | Q8 | X5 |
|---|---|---|
| Seats | 5 seats | 5 seats |
| Cargo (behind rear seats) | N/A (not specified) | 33.9 cu ft |
| Cargo (seats folded) | N/A (not specified) | 72.3 cu ft |
Off-road & Towing
| Spec | Q8 | X5 |
|---|---|---|
| Max towing | 7,700 lb | 7,200 lb |
| AWD / 4WD available | Yes | Yes |
Safety & Tech
| Spec | Q8 | X5 |
|---|---|---|
| Basic warranty | 4 yr / 50,000 mi | 4 yr / 50,000 mi |
“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 X5 if…
- you drive a lot and want lower running costs (25 mpg vs 19 mpg combined)
- you merge, overtake or climb hills with a full load (375 hp vs 335 hp)
- you want better city fuel economy (23 mpg vs 17 mpg)
- you cover long highway distances (27 mpg vs 23 mpg on the highway)
Also Compared
Frequently Asked Questions
Should I buy the Q8 or the X5?
On the specs compared here, the X5 makes more sense for most buyers; the Q8 doesn’t win a single measurable area.
Executive Summary
If it were just about the brand, you wouldn’t be here. So let’s talk about the Q8 and the X5 on their merits. I’d put better fuel economy at the top of the list, and it belongs to the X5. And if that weren’t enough, the X5 has 40 hp more power.
If your days lean on the things a spec sheet can’t capture, I’d pick the Q8; if they lean on engine & performance, the X5.
My pick: the X5.
Personal opinion based on the data above. Your priorities may differ.